Zhai Guangmei, Church Carena P, Breeze Alison J, Zhang Daoli, Alers Glenn B, Carter Sue A
Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
Nanotechnology. 2012 Oct 12;23(40):405401. doi: 10.1088/0957-4484/23/40/405401. Epub 2012 Sep 20.
We report on photovoltaic cells based on ternary PbS(0.9)Se(0.1) quantum dots utilizing a heterojunction type device configuration. The best device shows an AM 1.5 power conversion efficiency of 4.25%. Furthermore, this ternary PbS(x)Se(1-x) quantum dot heterojunction device has a peak external quantum efficiency above 100% at 2.76 eV, approximately 2.7× the bandgap energy. The ternary quantum dots combine the higher short circuit currents of the binary PbSe system with the higher open circuit voltages of the binary PbS system.
我们报道了基于三元PbS(0.9)Se(0.1)量子点的光伏电池，其采用异质结型器件结构。最佳器件的AM 1.5功率转换效率为4.25%。此外，这种三元PbS(x)Se(1-x)量子点异质结器件在2.76 eV处的峰值外量子效率高于100%，约为带隙能量的2.7倍。三元量子点将二元PbSe系统的较高短路电流与二元PbS系统的较高开路电压结合在一起。
