취업한 정신장애인의 근로실태에 관한 연구

황정우 숭실대학교 1999 국내석사

침강성 탄산칼슘의 기공 크기 제어에 관한 연구

황정우 성균관대학교 일반대학원 2009 국내석사

슬러리 기포탑을 이용하여 수산화칼슘 농도, CO2 유량 및 계면활성제 농도가 탄산칼슘의 morphology, 입자의 크기, 입자간의 응집화, 그리고 비표면적에 미치는 영향을 알아보기 위한 연구를 수행하였다. 실험에 사용한 반응기는 높이가 100cm이고 직경이 11cm, 그리고 중앙에는 직경 4cm인 튜브가 들어있는 8L 용량의 원통형 아크릴 반응기이다. 수산화칼슘의 conversion을 구하기 위해 FT-IR을 이용하였다. 실험 결과, 수산화칼슘의 농도가 증가할수록, CO2 유량이 감소할수록 수산화칼슘의 반응 종결 시간은 길어졌다. 합성된 탄산칼슘은 수산화칼슘의 농도가 증가할수록 입자 사이즈 및 비표면적이 증가하였다. SEM 이미지를 확인해 본 결과, 수산화칼슘의 농도와 CO2 유량이 증가할수록 합성된 탄산칼슘의 초기 입자 사이즈는 감소하였다. 그러나 레이저 회절 방식의 입도 분석기를 사용한 결과, 계면활성제를 첨가하지 않고 합성된 탄산칼슘에서는 수산화칼슘의 농도가 0.16 에서 0.64 wt%로 증가할수록 탄산칼슘의 평균 입도는 1 에서 4 μm로 증가하였다. 수산화칼슘의 농도가 증가할수록 초기 입자 사이즈는 작아지지만 2차적인 응집에 의해 평균 입도는 증가하는 것을 확인하였다. 반응속도에 따른 SEM 이미지로부터 합성된 탄산칼슘의 1차입자는 반응속도가 증가함에 따라 증가하였다. 또한 합성된 탄산칼슘의 2차적인 응집은 계면활성제(Dispex N40) 첨가로 인해 감소하였다. 계면활성제의 농도가 증가할수록 반응속도가 증가하므로 crystal의 사이즈는 증가하였다. 합성된 탄산칼슘의 비표면적과 morphology 또한 계면활성제의 첨가로 인해 변화하였다. Effects of Ca(OH)2 concentration, total flow rate, CO2 vol. fraction and concentration of surfactant on morphology of CaCO3, particle size of CaCO3, aggregation of primary particles and specific surface area were investigated in the slurry bubble column. Experiments were carried out in acrylic reactor(0.11 m-ID x 1.0 m-height) with a internal tube (0.04 m-ID x 1.0 m-height). The time of complete conversion of Ca(OH)2 increased with increasing Ca(OH)2 concentration and decreasing the flow rate of CO2. Particle sizes and specific surface area of CaCO3 synthesized were increased with Ca(OH)2 concentration. From SEM images, the primary particle size of CaCO3 synthesized was decreased with increasing Ca(OH)2 concentration and CO2 flow rate. However, average particle size from particle analyzer of laser method increased with increasing Ca(OH)2 concentration from 1 μm to 4 μm without surfactant (Dispex N40). Also, the primary particle size of CaCO3 synthesized was increased with increasing reaction rate. The secondary agglomerates of CaCO3 synthesized was reduced by adding the surfactant. From SEM images, the primary crystal size increased with increasing the amount of surfactant. The specific surface area and morphology of CaCO3 synthesized varied with adding of surfactant.

노동조합활성의 변화 및 그 요인에 관한 사례연구 : 조합내 정치과장을 중심으로

황정우 성균관대학교 1991 국내석사

항공기 부품의 양극산화피막 처리 공정에 대한 비교 연구

황정우 부산대학교 2008 국내석사

The purpose of this study is to make a comparative research on aluminum alloy materials of inorganic finish method in accordance with 4 types of their anodizing and thereon provide important information necessary for aircraft design, especially in terms of flight safety structure. For anodizing test specimen, 4 kinds of aluminum 2024-T3 were used. The test were reclassified into salt spray test, surface roughness test, coating weight test, coating thickness, lap bond shear test and peel test. The followings summarize the results of Boric-sulfuric acid anodizing(hereinafter, BSAA), Chromic acid anodizing(hereinafter, CAA), Phosphoric acid anodizing(hereinafter, PAA) and Sulfuric acid anodizing(hereinafter, SAA). The salt spray test of SAA found that #A and # B were most excellent because in both of the processes, there’s no corrosion throughout 139 days. In addition, the same test of BSAA found that corrosion took place in #A and #B, respectively 115 and 135 days later and that there was no problem in substituting CAA for BSAA because BAA was proved to be less harmful to environment and workers’ health than CAA. In the salt spray test of CAA, it was shown that corrosion occurred in #A and #B, respectively 35 and 56 days later while, in the same test of PAA, corrosion was found in #A and #B , respectively 15 days later. Results of the surface roughness test showed that BSAA and CAA were 0.472 ㎛ in surface roughness, same as in the raw material and that PAA and SAA were respectively 0.748 ㎛ and 0.669 ㎛ in the same measure. From the results of the coating weight test, it was found that SAA was heaviest with the coating thickness of 2136 ㎎/ft2 in the anodizing process , followed by CAA, 787 ㎎/ft2, BSAA, 496 ㎎/ft2 and PAA, 36.8 ㎎/ft2 in order. The foresaid test also showed that in the process of anodizing, SAA was highest in coating thickness, or 12 ㎛, followed by CAA, 3.0 ㎛, BSAA, 2.0 ㎛ and PAA, 0.5 ㎛ in order. Results of the lap bond shear test showed that PAA was 4147 PSI in shear, highest in the process of anodizing, followed by BSAA, 3550 PSI, CAA, 3379PSI and SAA, 3342 PSI in order. In the results of the peel test, it was found that PAA was 154 IN-LB/IN in adhesion, which was highest in the anodizing process, followed by CAA, 116 IN-LB/IN, SAA , 102 IN-LB/IN and BSAA, 79 IN-LB/IN in order.

주변 온도 변화를 고려한 열화상 카메라의온도 데이터 보정 알고리즘에 대한 연구

황정우 한림대학교 2016 국내석사

열화상 카메라의 열화상 센서가 측정하는 픽셀 데이터는 외부 환경 요인에 의해 영향을 받으며, 정확한 온도 측정값을 구하기 위하여서는 이에 대한 보정알고리즘이 필요하다. 본 논문에서는 외부 환경 요인 중 주변 온도가 열화상 카메라 데이터에 미치는 영향을 고려하여 저가 열화상 카메라의 픽셀 데이터의 보정 알고리즘을 설계하였으며, 실험을 통하여 외부 온도에 따른 픽 셀 데이터의 온도 오차 보정 알고리즘의 타당성을 확인하였다. 또한 보정 알고리즘을 적용하여 열화상 픽셀 데이터로부터 대상체의 온도를 얻어내는 모델을 추정하였으며, 열화상 카메라가 측정한 열화상 데이터를 이 모델에 기반하여 변환한 온도와 흑체의 온도가 일치하는지 확인한 결과± 2∘C 이하로 범용 열화상카메라들이 허용하는 범위이내이다. Since the measurement of thermal data using infrared thermal sensors is influenced by environmental factors, compensation algorithm should be developed for the correct temperature measurements. In this thesis, a compensation algorithm for pixel data of low cost infrared sensors has been designed considering the relationship between environmental temperature and thermal infrared data. Using the compensation algorithm, a temperature measurement model was suggested and verified through experiments. The experimental results showed that the temperature measurement errors were within ± 2∘C which is usually allowed in normal theraml infrared cameras.

정신장애인의 행복감 영향요인 연구

황정우 숭실대학교 대학원 2011 국내박사

This study aimed to examine how persons with mental disorders feel about happiness in their recovery process and what is the factor affecting happiness of theirs. For this, factors influencing their happiness were composed of demographic factors, psychosocial traits, living experiences and service environments. The survey for collecting data was conducted for adult people who were participating in mental health institutions for recovery from their mental disorders. The number of questionnaire analyzed was 580 witch was collected from 49 community mental health centers, social rehabilitation facilities and mental hospitals across the nations. For the data analysis, SPSS 18.0 was used and we conducted descriptive analysis, t-test, one-way ANOVA analysis and hierarchical multiple regression analysis. Main findings are as follows. First, the happiness degree of persons with mental disorders was very low. And It were statistically significant in difference analysis that groups participating in sheltered workshop are feeling highest happiness. In analysis of affecting factos it was appeared that self-esteem, psychiatric symptom, vocational state, peer relationship, physical health, school career and sense of personal control are affecting happiness significantly. In particularly, psychosocial traits including self-esteem, psychiatric symptom and sense of personal control were explaining happiness in the highest of 46.6%. And it was confirmed that different factors are affecting sub-factors of happiness just like life satisfaction, positive emotion and negative emotion. This study is a first try exploring happiness of persons with mental disorders quantitatively across the nations. And this study explored happiness of persons with mental disorders in their recovery process through interconnecting happiness theory of positive mental health persfective and consumer oriented recovery model. So this study presented groud knowledge for advancing happines of persons with mental disorders. On the basis of the study results, suggestions for the social work practice will be as follows. First, the goals of service for persons with mental disorders must be directed to advancing factors affecting happiness. Though it is the best method that advancing happiness of persons with mental disorders. And development and performance of program witch increasing self-esteem and sense of personal control is needed. Because self-esteem is the powerful affecting factors witch influence life satisfaction and positive emotion, and sense of personal control is the powerful affecting factors witch influence negative emotion. In addition, we have to make the most of upward spirals of positive emotion for decreasing psychiatric symptoms. For instance we need to adapt positive psychotherapy to persons with mental disorders. And we need to provide persons with mental disorders with more job and programs advancing peer relationship, and persons who have high school career with cognitive interventions. New transition to recovery oriented policy for consumer is needed for building a system of policy. And remarkable project and fund must be provided for advancing happiness of nations including peoples with mental disorders. Finally, this study was focused on emotional happiness so more comprehensive study is needed to include functional happiness. Moreover, longitudinal research for generalization of this result and more objective method measuring living experiences and service environments are needed. 본 연구는 정신장애인이 회복을 지향하는 과정 속에서 느끼는 행복감의 수준은 어떠하며 이들의 행복감에 영향을 미치는 요인은 무엇인지 알아보는 것을 목적으로 하였다. 이를 위하여 인구사회학적 요인, 심리사회적 특성, 생활경험, 서비스 환경을 중심으로 연구모형을 도출하였다. 연구대상자는 정신보건기관으로부터 서비스를 받고 있는 만 19세 이상의 성인 정신장애인으로서 전국의 정신보건센터, 사회복귀시설, 정신과 병원 등 49개소 기관으로부터 수집된 580부의 설문지를 분석에 이용하였다. 자료분석은 SPSS 18.0을 이용하여 기술통계분석, t-검증, 일원분산분석, 위계적 다중회귀분석을 실시하였다. 주요 분석결과는 다음과 같다. 우선 정신장애인의 행복감 수준은 일반적으로 매우 낮은 것으로 나타났다. 또한 정신장애인의 특성에 따른 차이분석에서 보호작업장에 참가하고 있는 집단의 행복감이 가장 높은 것으로 나타났다. 영향요인의 전체모형 분석에서는 자아존중감, 정신과적 증상, 취업유무, 동료관계, 신체적 건강, 학력, 자기통제감의 순으로 행복감에 유의미한 영향력을 가지고 있는 것으로 나타났다. 특히 자아존중감, 정신과적 증상, 자기통제감을 포함하고 있는 심리사회적 특성이 행복감에 가장 큰 영향력을 미치고 있으면서 행복감에 대한 설명력의 46.6%를 차지하고 있었다. 아울러 행복감을 구성하고 있는 하위 요인인 삶의 만족, 긍정적 정서, 부정적 정서에 영향을 미치는 요인이 각각 다르게 작용하고 있음도 확인하였다. 본 연구는 국내에서 처음으로 진행된 정신장애인의 행복감에 대한 양적 연구라고 볼 수 있으며 긍정적 정신건강 관점의 행복이론을 당사자 중심의 회복관점과 접목하여 정신장애인의 행복감을 그들의 회복과정 속에서 탐색해 보았다. 이를 통해 향후 정신장애인의 행복감 증진을 위한 근거자료를 제시할 수 있었다. 연구결과를 바탕으로 사회복지 실천을 위한 제언을 다음과 같이 하였다. 우선 정신장애인을 위한 실천 서비스의 목적은 행복감 영향요인을 증진시키는 방향으로 설정되어야 한다. 이것이 낮은 정신장애인의 행복감을 증진시킬 수 있는 가장 빠른 길이 될 것이기 때문이다. 또한 정신장애인의 자아존중감과 자기통제감 증진을 위한 프로그램의 개발과 실천이 우선적으로 필요하다. 자아존중감은 삶의 만족과 긍정적 정서를 높일 수 있는 가장 강력한 영향요인이며 자기통제감은 부정적 정서를 줄일 수 있는 가장 영향력있는 영향요인이기 때문이다. 그리고 정신장애인의 정신과적 증상을 줄이기 위하여 긍정적 정서의 상승효과를 활용할 필요가 있으며 이를 위한 방법의 하나로 긍정심리치료적 접근을 활성화해야 할 것이다. 또한 정신장애인에게 보다 많은 일과 직장을 제공하고 동료관계의 증진을 도모할 수 있는 서비스의 활성화가 필요하다. 그리고 고학력 정신장애인을 위한 인지적 접근 또한 이들의 행복감 증진을 위하여 효과적일 것임을 제안하였다. 정신장애인을 위한 정책적 제안으로는 당사자 중심의 회복지향적 정책으로의 전향과 행복감 증진을 위한 구체적인 사업이나 예산투입의 확대를 제안하였다. 끝으로 본 연구의 한계 및 후속연구와 관련된 제언을 하였다. 즉 본 연구는 정서적 행복차원의 연구였으므로 향후 기능적 행복 차원을 포함한 폭넓은 연구가 진행되어야 할 것이다. 또한 본 연구의 생활경험과 서비스 환경에 대한 주관적 측정치를 보완할 수 있는 객관적인 측정방법의 시도가 필요하며 다양한 상황이나 시간 변화를 고려한 종단적 연구도 이루어져야 할 것이다.

톱밥과 왕겨 및 숯을 이용하여 제조한 보드 및 세라믹의 특성

황정우 전북대학교 2017 국내박사

In this study, it was carried out to provide basic data of board and woodceramics manufactured from ricehusk of agricultural by-product and sawdust of by-products formed during sawing process and charcoal of eco-friendly materials. The addition ratio of sawdust, ricehusk and charcoal was fixed 50:20:20, then the thickness swelling of mixed board was 5.54%, 7.95%, 10.73, when density was 0.5g/㎤, 0.6g/㎤, 0.7g/㎤ respectively, and satisfied quality standards of KSF 3104. Moreover the internal bond strength was 0.10N/㎟, 0.23N/㎟, 0.49N/㎟, when density was 0.5g/㎤, 0.6g/㎤, 0.7g/㎤ respectively, and satisfied quality standards matched with the KSF 3104. Meanwhile, the density fixed 0.6g/㎤, then thickness swelling and internal bond strength of mixed board, which prepared by addition ratio of sawdust, ricehusk and charcoal, was satisfied quality standards as same as KSF 3104. Next, the addition ratio of sawdust, ricehusk and charcoal fixed 50:20:20, then bending strength of mixed board was prepared by different density, and once again density was fixed 0.6g/㎤, while addition ratio was variable, at that time bending strength of mixed board was not satisfied quality standards as same as KSF 3104. The thickness swelling and internal bond strength of board, which manufactured by variable density and additon ratio of sawdust, ricehusk and charcoal, was satisfied quality standard of KSf 3104. But the quality was not satisfied standard as same as KSF 3104 for the bending strength at the same condition. Therefore, it could be used for building interior materials which did not require strength properties. The far-infrared emissivity of woodceramics prepared by using sawdust, rice husk and charcoal was 0.925~0.933. In particular, the woodceramics manufactured by board, which made from 50:35:5 of addition ratio (sawdust:ricehusk:charcoal) and a density of 0.6g/㎤, was impregnated with a resin impregnation ratio of 40%, and carbonized at 800℃, showed the highest far-infrared emissivity of 0.933. The sound absorption of woodceramics prepared by variable conditions, was 20~45% at all frequencies. The woodceramics manufactured by board made from 50:20:20 of addition ratio and a density of 0.5g/㎤, was impregnated with a resin impregnation ratio of 40%, and carbonized at 800℃, showed the highest sound absorption of 35~45% at all frequencies. Moisture absorption and desorption of the manufactured woodcermics by each production condition was as follows. The woodceramics manufactured by board made from 50:20:20 of addition ratio and a density of 0.6g/㎤, was impregnated with a resin impregnation ratio of 40%, and carbonized at 600℃, showed the highest moisture absorption and desorption of 16.199kg/㎡ and 16.632kg/㎡ in the middle humidity. The woodceramics manufactured by board made from 50:35:5 of addition ratio and a density of 0.6g/㎤, was impregnated with a resin impregnation ratio of 40%, and carbonized at 800℃, showed the highest moisture absorption and desorption of 15.136kg/㎡ and 15.136kg/㎡ in the high humidity. The deodorization of formaldehyde of woodceramics prepared by using sawdust, rice husk and charcoal was more than 85%. In particular, the woodceramics manufactured by board made from 50:20:20 of addition ratio and a density of 0.6g/㎤, was impregnated with a resin impregnation ratio of 40%, and carbonized at 800℃, showed the highest deodorization of formaldehyde of 89%. In the present study, the woodceramics made from our proposed of sawdust, rice husk and charcoal, can be used in building interior materials, kitchen tools, public bath facilities with high far-infrared emissivity of 0.925~0.933. In addition, it can be applied to educational institutions, religious organizations, cultural facilities, sports facilities, musical instrument training rooms, etc., because of it is a sound absorption capacity of 20 to 45% at all frequencies. It can also be used for finishing materials, general walls, furniture because of woodceramics made from sawdust, rice husk and charcoal, which had the high deodorizing effect more than 85% and high moisture adsorption/desorption performance. Woodceramics made from sawdust, ricehusk and charcoal are considered to have sufficient potential for utilization as functional building interior materials.

소규모 부동산 개발 시 지주공동사업의 문제점과 대안으로서 신탁제도의 활용

황정우 한성대학교 부동산대학원 2011 국내석사

소규모 부동산 개발 시 지주와 건설회사(개발회사)의 문제점을 분석하여 대안으로서 신탁제도의 활용에 관한 것이다. 소규모 지주공동사업은 사업의 특성상 조건과 환경이 다양하고 복합적인 요소가 많음에 따라 여러 문제점이 발생한다. 현재 가장 많이 이용하고 있는 소규모 지주공동사업에 비해 기존의 연구는 지주공동사업과 신탁제도의 각각의 전반적인 연구를 바탕으로 활성화방안에 관한 것이며, 구체적인 소규모 지주공동사업의 문제점 분석에 따른 대안을 제시한 사항은 미흡하다. 본 연구는 소규모지주공동사업의 문제점이 지주와 건설회사(개발회사)의 이해 당사자 간의 문제뿐만 아니라 사회의 전반적인 문제로 확대가 되는 사항을 분석하였다. 본 연구는 지주공동사업의 문제점을 사례 연구를 통하여 분석하였으며, 지주의 가장 중요한 문제점인 상호 신뢰와 합의에 관한 사항과 소유권의 권리침해 사항을 파악하였으며, 대안으로서 신탁제도로 추진 시에 신탁제도의 특징과 장점을 활용하여 신탁회사의 전문성과 신뢰성을 기본으로 하여 우수한 사업 운용 능력으로 지주공동사업의 문제점을 사전에 분석하여 해결 방안을 제시하였다. 본 연구는 지주공동사업의 다양함에 비해 4가지 사례조사로 분석한 사항은 한계가 있으며, 향후 연구에서는 지주공동사업과 신탁제도의 합리적이고 표준화된 자료와 법률과 제도 보완이 필요하다. 본 연구가 소규모 지주공동사업 활성화와 신탁제도 활용에 기여 할 수 있다고 본다.

톱밥;귤박 혼합보드로 제조한 세라믹의 물리적 및 기계적 성질

황정우 전북대학교 대학원 2011 국내석사

The present study Physical and Mechanical Properties of Ceramics manufactured from a Board Mixed with Sawdust and Mandarin Peels aimed at offering basic data for the development of new application of sawdust and mandarin peels for making boards. The aim of the study is to use the by-products sawdust, formed during sawing and mandarin peels which are agricultural by products. The boards were manufactured by mixing the sawdust and mandarin peels at different mixing ratio and density. The boards were then converted to ceramics by various percentage of resin impregnation and at different carbonization temperatures. Finally, we investigated the properties of those boards and ceramics. The results of this study were as follows: 1. Properties of resin impregnated board 1) At the same conditions of impregnation, the addition rate was increased with increasing rates of resin impregnation. The rate of density of resin impregnated board was the highest at 25% rate of addition and in terms of physical properties following the resin impregnation, as the quantity of mandarin peels increased, the linear swelling increased and thickness swelling decreased. 2) The physical properties were measured after the resin impregnation according to the density of board, the higher the density, the higher the increase of thickness swelling and linear swelling; the lower the percentage of resin impregnation, the rate of density was increased. 2. Properties of ceramics mixed with sawdust and mandarin peels 1) As the percentage of resin impregnation increased, the weight loss was decreased; on the other hand, density, linear shrinkage and thickness shrinkage increased. Meanwhile, the carbonization temperature at 800 oC showed the highest values, as the compression strength was 150.7 kgf/cm2 and the bending strength was 87.5 kgf/cm2 with the percentage of resin impregnation at 70%. 2) As the carbonization temperature increased, the weight loss was increased and linear thickness shrinkage increased to 1000 ℃ and the subsequent increase was insufficient. Meanwhile, the carbonization temperature at 1200 oC showed the highest values of the compression strength 175.4 kgf/cm2 and the bending strength 113.1 kgf/cm2. 3) As the percentage of mandarin peels addition increased, the weight loss, linear shrinkage and thickness shrinkage was decreased and Meanwhile, the percentage of mandarin peels addition at 5% showed the highest values of the compression strength 114.4 kgf/cm2 and the bending strength 87.9 kgf/cm2.. 4) In terms of changes in surface temperature of ceramics, we could found that the velocity was fast in the early time of heat transfer until 10 minutes and after that the velocity increased but not very fast. At the elapsed time of 30 minutes, the surface temperature of ceramics increased with the carbonization temperature and rate of mandarin peels addition did not influence the surface temperature. 5) The minimum density to average density ratio of ceramics decreased with increasing carbonization temperature and rate of resin impregnation but the minimum density to average density ratio of ceramics increased with decreased percentage of mandarin peels addition. 6) Far - infrared emissivity had no constant tendency in rate of mandarin peels addition, it decreased with increase of carbonization temperature.

InN 층과 그라핀을 이용한 InGaN/GaN LEDs의 광 특성 조작

황정우 전북대학교 일반대학원 2012 국내석사

In this paper, we study the optical properties of InGaN/GaN light-emitting diodes (LEDs) modulated by inserting an InN layer between InGaN and GaN, and depositing graphene on the top p-GaN cladding layer, respectively. The optical and structural properties of the InGaN/GaN LEDs were investigated by using photoluminescence (PL), high-resolution X-ray diffraction (HR-XRD) and atomic force microscopy (AFM). The emission wavelength for the LED with the 6-stacked InGaN/GaN multiple quantum wells (MQWs) was red-shifted by 3 nm by inserting an InN layer from the reference sample. To further investigation on the effect of the InN layer, the rapid thermal annealing (RTA) process was carried out. The emission wavelength for the InGaN/GaN LED without the InN layer after the thermal treatment was blue-shifted by 3.5 nm from the as-grown sample. However, the emission peak for the InGaN/GaN LED with the InN layer subjected to thermal annealing was red-shifted by 3 nm from the as-grown sample. This can be ascribed to the modulation in the probability in the inter-diffusion of group Ⅲ elements at the interface between InGaN and GaN by inserting an InN layer. Also, the low potential barrier of the InN can practically influence the red-shift in the emission wavelength. The effects of a graphene layer deposited on the p-GaN cladding layer on the emission efficiency of the InGaN/GaN LEDs were investigated by Raman, AFM, and PL spectroscopy. From the raman spectra for the LED samples with the graphene layer, the G and G’ bands were observed indicating that the graphene layer was clearly formed. For the InGaN/GaN LEDs formed on the planar sapphire substrate, the PL intensity of the LEDs with the graphene layer was drastically decreased compared to that without the graphene layer. However, the PL intensity for the InGaN/GaN LEDs based on the patterned sapphire substrate was increased more than 1.5 times by depositing the graphene layer compared to that of the LEDs without the graphene layer. This can be ascribed to the combining effect of the enhancement in the internal reflection at the PSS and the improvement in the radiative recombination of electron-hole pairs in the active layer cased by the periodic coupling of the graphene structures.