pn结太阳电池饱和电流密度的理论研究

为提高太阳电池的开路电压Vac和效率η，必须减小饱和电流Jo，据此，对影响Jo的各种因素进行了研究，推导了更为普遍的有限尺寸条件下太阳电池的表面复合速度和少子加速场对Jo影响的表达式，并且对两者的影响进行了数值模拟，直观地得出了以下结论：在保证消除重掺杂效应带来不良影响的条件下，增大发射区少子漂移场强，可减小，Jo，提高电池Vco；减少电池的表面复合速度，能提高电池的性能。

A Study of Saturated Current Density of Solar Cells with pn Junction

Based on a fundamental theory of solar cells, the saturated current density Jo has to be reduced to enlarge the open circuit voltage Voc and even the efficiency η of solar cells. In this paper factors affecting Jo have been studied in detail. In mathematics we have deducted an expression of Jo under a general condition of finite size of cells. The Jo is mainly depended on two parameters: a surface recombination velocity S and a minority drift electrical field E which are simulated numerically. The results show that enhancement of E in emitter region can lead to reducing of Jo and increasing of Voc, and the reduction of S can enhance the performance of cells.