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( Adi Prasetio ),( Jahandar Muhammad ),김소연,임동찬 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
These days, the non-fullerene (NF) acceptors replace the fullerene derivatives because of their superiority. However, NF acceptors frequently behave react with the polyethyleneimine ethoxylated (PEIE), and hence a decline in the device performance and stability could not be avoided. Herein, we demonstrated a novel strategy to mitigate the reaction between PEIE and NF acceptor by introducing the ethanedithiol self-assembled monolayer (SAM) at the PEIE/photoactive layer. As a result, the PEIE with EDT-SAM exhibits lower WF, suppressed trap-assisted recombination, and higher electron mobility compared to pristine PEIE counterparts. Consequently, the open-circuit voltage (VOC) and fill factor (FF) are drastically improved. Therefore, a significant performance enhancement was obtained for the PEIE-EDTbased devices with the power conversion efficiency (PCE) of >12% for rigid and >10% for flexible devices.
Indoor organic photovoltaics-practicalization of self-sustainable IoT devices
( Jahandar Muhammad ),김소연,( Adi Prasetio ),임동찬 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
In this work, large area organic photovoltaic devices with PBTZT-stat- BDTT-8:PC71PM photoactive layer are fabricated to develop indoor power generators for low power, portable and wireless electronic devices. The better spectral matching of PBTZT-stat-BDTT-8 based photoactive absorber layer with light-emitting diode (2700K and 6500K) emission spectra translate a power conversion efficiency over 18% for single cell (0.38 ㎠) device. Whereas, power conversion efficiencies over 17% and 16% are observed for mini-module (18.63 ㎠) and sub-module (40 ㎠) under 1000 lux light-emitting diode (2700K) illumination, respectively. Finally, we demonstrated the commercially available programmable arduino boards and Bluetooth based internet of things devices integrated with organic photovoltaics to create a self-sustainable communication system that can function well under indoor environment.
Mauleti Ifael Yerosias,Wibisana Krishna Adi,Syamsuridzal Djati Prasetio,Mulyati Sri,Lisdawati Vivi,Saptarini Ika,Nurhayati,Hasiguan Armedy Ronny,Hendarwan Harimat 대한예방의학회 2024 예방의학회지 Vol.57 No.3
Objectives: This study investigated factors associated with the retention of people living with human immunodeficiency virus (HIV) on antiretroviral therapy (ART) during the first 3 years of treatment.Methods: A retrospective study using electronic health records was conducted at a tertiary hospital in Jakarta, Indonesia. Adult HIV-positive patients who started ART from 2010 until 2020 were included. A binary logistic regression model was used to identify factors associated with ART retention in the first 3 years.Results: In total, 535 respondents were included in the analysis. The ART retention rates for the first, second, and third years were 83.7%, 79.1%, and 77.2%, respectively. The multivariate analysis revealed a negative association between CD4 count when starting ART and retention. Patients with CD4 counts >200 cells/mL were 0.65 times less likely to have good retention than those with CD4 counts ≤200 cells/mL. The year of starting ART was also significantly associated with retention. Patients who started ART in 2010-2013 or 2014-2016 were less likely to have good retention than those who started ART in 2017-2020, with adjusted odds ratios of 0.52 and 0.40, respectively. Patients who received efavirenz-based therapy were 1.69 times more likely to have good retention than those who received nevirapine (95% confidence interval, 1.05 to 2.72).Conclusions: Our study revealed a decline in ART retention in the third year. The CD4 count, year of enrollment, and an efavirenz-based regimen were significantly associated with retention. Patient engagement has long been a priority in HIV programs, with interventions being implemented to address this issue.