卤化物
钙钛矿(结构)
带隙
串联
材料科学
相(物质)
格子(音乐)
化学物理
光电子学
化学
无机化学
结晶学
物理
复合材料
声学
有机化学
作者
Daniel J. Slotcavage,Hemamala I. Karunadasa,Michael D. McGehee
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2016-11-16
卷期号:1 (6): 1199-1205
被引量:544
标识
DOI:10.1021/acsenergylett.6b00495
摘要
In the few short years since the inception of single-junction perovskite solar cells, their efficiencies have skyrocketed. Perovskite absorbers have at least as much to offer tandem solar cells as they do for single-junction cells due in large part to their tunable band gaps. However, modifying the perovskite band structure via halide substitution, the method that has been most effective at tuning band gaps, leads to instabilities in the material for some compositions. Here, we discuss the thermodynamic origin and consequences of light-induced phase segregation observed in mixed-halide perovskites. We propose that, as the phase segregation is rooted in halide migration and possibly affected by lattice strain, modifying the perovskite composition and lattice structure, increasing compositional uniformity, and reducing defect concentrations could significantly improve stability.
科研通智能强力驱动
Strongly Powered by AbleSci AI