http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Liu, Guanchen,Xie, Xiaoyin,Liu, Zhihai,Cheng, Guanjian,Lee, Eun-Cheol The Royal Society of Chemistry 2018 Nanoscale Vol.10 No.23
<P>In this study, we introduced alcohol based vapor annealing of a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) layer for fabricating high-performance inverted perovskite solar cells. Atomic force microscopy measurements and atomistic theoretical simulations indicated that phase separation between PEDOT and PSS was enhanced by this annealing, improving the hole conductivity at the PEDOT:PSS layer. As a result of using methanol, the short-circuit current density improved from 20.7 to 21.6 mA cm<SUP>−2</SUP>; consequently, the power conversion efficiency (PCE) improved from 16.1 to 17.3%. However, using ethanol or isopropanol yielded a smaller performance improvement. The PCEs of the best sample in this study under forward and reverse scans were 17.7 and 18.0%, respectively, indicating that the PSC had a small hysteresis. Our results suggest that alcohol vapor annealing is a simple and effective method of developing high-performance inverted perovskite solar cells.</P>
Liu, Yawen,Liu, Zhihai,Lee, Eun-Cheol The Royal Society of Chemistry 2018 Journal of materials chemistry. C, Materials for o Vol.6 No.25
<P>Organolead trihalide perovskite materials have attracted considerable interest for their successful application as light absorbers in efficient photovoltaic cells. Several lead sources have been used for the preparation of perovskites, among which lead acetate (Pb(Ac)2) is an important candidate. However, simply mixing Pb(Ac)2 and methylamine iodide in <I>N</I>,<I>N</I>-dimethylformamide solvent leads to poor perovskite morphology, which is disadvantageous for the device performance. Herein, we used dimethyl sulfoxide (DMSO) as a solvent additive to improve the quality of Pb(Ac)2-based perovskite films. We observed that using 5.0% DMSO could significantly enhance the crystallinity of the perovskite film with enlarged domain size. Consequently, the power conversion efficiency (PCE) of the relevant perovskite solar cells (PSCs) was drastically enhanced from 12.88 to 16.59% (on average), with simultaneous improvement in the open-circuit voltage, short-circuit current density, and fill factor. A champion PCE of 17.06% with negligible hysteresis was achieved for PSCs prepared using 5.0% DMSO as the solvent additive. Our results indicate that using DMSO for the preparation of a Pb(Ac)2-based perovskite film is an effective way to fabricate high-performance PSCs.</P>
Liu, Zhihai,Xie, Xiaoyin,Liu, Guanchen,Lee, Eun-Cheol Elsevier 2019 Organic electronics Vol.64 No.-
<P><B>Abstract</B></P> <P>We introduced phenyl-C61-butyric acid methyl ester (PCBM) as an electron transport layer to improve the performance of metal-oxide-free perovskite solar cells (PSCs) using high-conductivity poly(3,4-ethylenedioxylenethiophene):poly(styrene sulfonate) (PEDOT:PSS) as the cathode. The work function of the PEDOT:PSS was tuned from −5.08 to −4.05 eV by using polyethylenimine, improving the electron collection. Using PCBM improved the electron transport and suppressed the charge recombination of the PSCs. The power-conversion efficiency (PCE) of the rigid PSCs (on glass substrates) was significantly improved from 12.5% to 13.9%, and the open-circuit voltage, short-circuit current density, and fill factor were improved simultaneously. The long-term stability of the PSCs was also improved: the PCE degradation of the PSCs without encapsulation decreased from 18.4% to 13.0% after 114 h. Using a 37-nm PCBM layer, the flexible PSCs on polyethylene naphthalate substrates exhibited a high PCE of 11.4% with good bendability. Our results indicate that using PCBM as an electron transport layer in metal-oxide-free PSCs is a feasible method for the large-scale roll-to-roll production of PSCs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> High-performance metal-oxide-free PSC produced with PCBM as electron transport layer. </LI> <LI> High PCE of 13.9% was achieved for rigid PSCs on a glass substrate. </LI> <LI> Long term stability of the PSCs was also improved upon using PCBM. </LI> <LI> Flexible PSCs on a PEN substrate exhibited a high PCE of 11.4% with good bendability. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Association of the KAP 8.1 Gene Polymorphisms with Fibre Traits in Inner Mongolian Cashmere Goats
Liu, Haiying,Yue, Chun-Wang,Zhang, Wei,Zhu, Xiaoping,Yang, Guiqin,Jia, Zhihai Asian Australasian Association of Animal Productio 2011 Animal Bioscience Vol.24 No.10
The objective of this study was to investigate polymorphisms of keratin-associated protein 8.1 (KAP8.1) gene and its effect on fibre traits of Chinese Inner Mongolian Cashmere goats. The fibre traits data investigated were cashmere fibre diameter, combed cashmere weight, cashmere fibre length and guard hair length. Five hundred and forty animals were used to detect polymorphisms in the complete coding sequence of the hircine KAP8.1 gene by means of PCR-SSCP. The results identified six genotypes, AA, BB, CC, AB, AC and BC, coded for by three different alleles A, B and C. Two SNPs in the coding region were confirmed by sequencing, which were T113G and G116C respectively. The relationships between the genotypes and cashmere fibre diameter, combed cashmere weight, cashmere fibre length and guard hair length were analyzed. There were significant differences between the associations of the different genotypes with cashmere weight (p<0.01), cashmere length (p<0.05) and hair length (p<0.01). Cashmere fibre diameter was the only trait that was not associated with the genotypes. The animals of genotype AB and BB had the higher cashmere weight compared with the genotype AA. By further analysis, it appeared that the KAP8.1 genotype effects on fibre traits may be due to a mutation at the 113 locus. These results suggested that polymorphisms in the hircine KAP8.1 gene might be a potential molecular marker for cashmere weight in Cashmere goats.
Liu, Haiying,Li, Ning,Jia, Cunling,Zhu, Xiaoping,Jia, Zhihai Asian Australasian Association of Animal Productio 2007 Animal Bioscience Vol.20 No.6
The aim of the experiment was to detect polymorphisms in the keratin-associated protein 8.2 (KAP8.2) gene to determine associations between the genotype and fibre traits in Chinese Inner Mongolia cashmere goats. The fibre traits data investigated were cashmere fibre diameter, combed cashmere weight, cashmere fibre length and guard hair length. Five hundred and forty-two animals were used to detect polymorphisms in the complete coding sequence of the hircine KAP8.2 gene by means of PCR-SSCP. The results identified six genotypes, AA, BB, DD, AB, AD and BD, coded for by three different alleles A, B and D. Two SNPs in the coding region were confirmed by sequencing, which were A214G and T218C respectively. The relationships between the genotypes and cashmere fibre diameter, combed cashmere weight, cashmere fibre length and guard hair length were analyzed. There were significant differences (p<0.01) between the associations of the different genotypes with cashmere fibre diameter, cashmere weight and hair length. Cashmere length was the only trait that was not associated with the genotypes. The genotype AA (0.73) was found to be predominant in Inner Mongolia cashmere goats and the animals with this genotype had the thinnest cashmere fibre diameter compared with the other genotypes. These results suggested that polymorphisms in the hircine KAP8.2 gene may be a potential molecular marker for cashmere fibre diameter in cashmere goats.
Xu, Chongyang,Liu, Zhihai,Lee, Eun-Cheol The Royal Society of Chemistry 2018 Journal of Materials Chemistry C Vol.6 No.26
<P>In this work, we used poly(3,4-ethylenedioxylenethiophene):poly(styrene sulfonate) (PEDOT:PSS, PH 1000) and poly(bis(4-phenyl)(2,4,6-trimethylphenyl)amine) (PTAA) as anode and hole transport materials, respectively, for fabricating metal oxide-free inverted perovskite solar cells (PSCs). The sheet resistance of the PEDOT:PSS (PH 1000) anode was reduced to 76 Ω sq<SUP>−1</SUP> after treatment with ethylene glycol and phosphoric acid, a level comparable to that of conventional indium tin oxide. The hydrophobicity of PTAA improved the perovskite crystallization, facilitating performance improvements in the PSCs. A high power conversion efficiency (PCE) of 14.23% was achieved for these structured rigid PSCs on a rigid glass substrate, with the short-circuit current density, open-circuit voltage, and fill factor of 19.88 mA cm<SUP>−2</SUP>, 1.02 V, and 70.2%, respectively. Flexible PSCs on a polyethylene terephthalate substrate exhibited a high PCE of 10.51% with excellent bendability. Our results indicate that using anodes of PEDOT:PSS (PH 1000) and hole transport layers of PTAA presents a promising fabrication method for high-performance rigid and flexible metal oxide-free PSCs, which suggests future large-scale and roll-to-roll production.</P>