Department of Materials Science, University of Florida, Gainesville, Florida 32611, United States.
ACS Appl Mater Interfaces. 2013 Aug 14;5(15):7215-8. doi: 10.1021/am4015605. Epub 2013 Jul 23.
The effect of ZnO defects on photoexcited charge carrier recombination and forward induced charge transfer was studied in organic-inorganic bilayer organic heterojunction solar cells. Decreased bimolecular recombination via passivation of ZnO nanopariticle defects resulted in longer carrier lifetime as determined by transient photovoltage (TPV) measurements. It was also found by time-resolved photoluminescence (TRPL) measurements that defect passivation decreased the fluorescence lifetime which indicated higher exciton dissociation efficiency. Through passivation of the ZnO nanoparticles defects, the two loss mechanisms were reduced and the power conversion efficiency (PCE) is significantly enhanced.
研究了 ZnO 缺陷对有机-无机双层有机异质结太阳能电池中光激发载流子复合和正向诱导电荷转移的影响。通过钝化 ZnO 纳米颗粒缺陷，减少了双分子复合，从而导致载流子寿命延长，这可以通过瞬态光电压（TPV）测量来确定。通过时间分辨光致发光（TRPL）测量还发现，缺陷钝化降低了荧光寿命，这表明激子解离效率更高。通过钝化 ZnO 纳米颗粒缺陷，减少了两种损耗机制，从而显著提高了功率转换效率（PCE）。
