能量转换效率
光伏
开路电压
短路
材料科学
电流密度
量子效率
光电子学
纳米颗粒
量子点
电压
化学工程
光伏系统
纳米技术
电气工程
物理
工程类
量子力学
作者
Guangmei Zhai,Anna Bezryadina,Alison J. Breeze,Daoli Zhang,Glenn Alers,Sue A. Carter
摘要
The short-term (less than 1 hour) exposure of TiO2/PbS quantum dot photovoltaics to air increases the open circuit voltage (Voc) and fill factor (FF) while slightly decreasing the short circuit current density (Jsc), leading to a power conversion efficiency above 4% and a peak external quantum efficiency over 80% for 1.1 eV PbS. The resulting Jsc, Voc, and FF under 100 mW/cm2 AM1.5 are 18.6 mA/cm2, 0.517 V, and 42% for 1.1 eV PbS and 8.03 mA/cm2, 0.655 V, and 35% for 1.7 eV PbS, respectively. Long-term air exposures result in much lower conductivities. Furthermore, short-term air exposure effects are fully reversible upon removal from air, and longer-term effects are mostly reversible through soaking in 1,2-ethanedithiol.
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