Garcia-Belmonte Germà, Guerrero Antonio, Bisquert Juan
Photovoltaic and Optoelectronic Devices Group, Departament de Física, Universitat Jaume I, ES-12071 Castelló, Spain.
J Phys Chem Lett. 2013 Mar 21;4(6):877-86. doi: 10.1021/jz302064z. Epub 2013 Mar 4.
We discuss the progress and challenges in the application of impedance spectroscopy analysis to determine key processes and parameters in organic bulk-heterojunction solar cells. When carrier transport or outer interface extraction do not severely influence the solar cell performance, a simple method to quantify the open-circuit voltage loss caused by the kinetics of charge carrier recombination is provided, based on the determination of chemical capacitance and recombination resistance. This easily allows distinguishing between energetic and kinetic effects on photovoltage, and establishes a benchmark for the performance comparison of a set of different cells. A brief discussion of impedance analysis in the much less studied case of collection-limited solar cells is introduced.
我们讨论了阻抗谱分析在确定有机本体异质结太阳能电池关键过程和参数方面的应用进展与挑战。当载流子传输或外界面提取对太阳能电池性能影响不严重时，基于化学电容和复合电阻的测定，提供了一种量化由电荷载流子复合动力学引起的开路电压损失的简单方法。这便于区分对光电压的能量和动力学效应，并为一组不同电池的性能比较建立基准。还介绍了在研究较少的收集受限太阳能电池情况下的阻抗分析。
