Device model for the operation of polymer/fullerene bulk heterojunction solar cells
Device model for the operation of polymer/fullerene bulk heterojunction solar cells
复制标题
DOI：
10.1103/physrevb.72.085205
复制
发表时间：
2005-08-01
影响因子：
3.7
通讯作者：
Blom, PWM
中科院分区：
文献类型：
--
作者：
Koster, LJA;Smits, ECP;Blom, PWM
我们已经开发了一个数值装置模型，该模型一致地描述了聚合物：富勒烯体异质结太阳能电池的电流电压特性。结合了双分子重组和依赖于温度和场的自由电荷产生机制。研究表明，在聚[2-甲氧基-5-(3（'),7(')-二甲基辛基氧基）-对苯基乙烯]- (OC1C10-PPV-)和[6,6]-苯基c -61-丁酸甲酯-(PCBM-) （1:4 wt. %）的太阳能电池中，空间电荷效应只起很小的作用，导致器件中的电场相对恒定。此外，在短路条件下，由于双分子重组，只有7%的自由载流子丢失。该模型预测，在增加空穴迁移率的同时，受体强度降低0.5 eV，将使PPV/ pcbm太阳能电池的最高效率达到5.5%。
We have developed a numerical device model that consistently describes the current-voltage characteristics of polymer:fullerene bulk heterojunction solar cells. Bimolecular recombination and a temperature- and field-dependent generation mechanism of free charges are incorporated. It is demonstrated that in poly[2-methoxy-5-(3('),7(')-dimethyloctyloxy)-p-phenylene vinylene]- (OC1C10-PPV-) and [6,6]-phenyl C-61-butyric acid methyl ester- (PCBM-) (1:4 wt. %) based solar cells space-charge effects only play a minor role, leading to a relatively constant electric field in the device. Furthermore, at short-circuit conditions only 7% of all free carriers are lost due to bimolecular recombination. The model predicts that an increased hole mobility together with a reduction of the acceptor strength of 0.5 eV will lead to a maximum attainable efficiency of 5.5% in the PPV/PCBM-based solar cells.