排序方式: 共有2条查询结果,搜索用时 0 毫秒
1
1.
Chongwen Li Zhaoning Song Dewei Zhao Chuanxiao Xiao Biwas Subedi Niraj Shrestha Maxwell M. Junda Changlei Wang Chun‐Sheng Jiang Mowafak Al‐Jassim Randy J. Ellingson Nikolas J. Podraza Kai Zhu Yanfa Yan 《Liver Transplantation》2019,9(3)
The unsatisfactory performance of low‐bandgap mixed tin (Sn)–lead (Pb) halide perovskite subcells has been one of the major obstacles hindering the progress of the power conversion efficiencies (PCEs) of all‐perovskite tandem solar cells. By analyzing dark‐current density and distribution, it is identified that charge recombination at grain boundaries is a key factor limiting the performance of low‐bandgap mixed Sn–Pb halide perovskite subcells. It is further found that bromine (Br) incorporation can effectively passivate grain boundaries and lower the dark current density by two–three orders of magnitude. By optimizing the Br concentration, low‐bandgap (1.272 eV) mixed Sn–Pb halide perovskite solar cells are fabricated with open‐circuit voltage deficits as low as 0.384 V and fill factors as high as 75%. The best‐performing device demonstrates a PCE of >19%. The results suggest an important direction for improving the performance of low‐bandgap mixed Sn–Pb halide perovskite solar cells. 相似文献
2.
Daman Abel Harris Frederick Biwas Suman Wallace James Phoenix David A. 《Molecular and cellular biochemistry》2001,223(1-2):159-163
The protease, mcalpain, has been implicated in a number of pathological conditions. The enzyme is a calciumdependent heterodimer whose activity appears to be modulated by membrane interaction involving a segment, TAMRIL, located in domain V of the protein's small subunit. Based on a sequence analysis of mcalpain, using DWIH and hydrophobic moment plot based methodologies, we have shown that this segment may contribute to a lipid interactive, oblique orientated, helical region. Our results could form a basis for future studies on the postulated lipid modulation of mcalpain activity. 相似文献
1