Interfacial charging originated from the conductivity decrease of C60 layer in IZO/pentacene/C60/Al organic double-layer solar cells
Interfacial charging originated from the conductivity decrease of C60 layer in IZO/pentacene/C60/Al organic double-layer solar cells
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DOI：
10.1016/j.orgel.2013.11.005
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发表时间：
2014
影响因子：
3.2
通讯作者：
Xiangyu Chen;D. Taguchi;T. Manaka;M. Iwamoto
中科院分区：
文献类型：
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作者：
Xiangyu Chen;D. Taguchi;T. Manaka;M. Iwamoto
利用铟锌氧化物/并五苯/C60/Al的正常结构及其倒置双层体系研究了双层有机太阳能电池界面充电过程的起源。利用光电场诱导二次谐波产生（EFISHG）技术研究了两种OSCs的界面充电过程，结果表明，由于C60层电导率的降低，界面充电导致了极性相反的电荷积累。将EFISHG测量应用于倒置的OSC也表明，在供体-受体界面上的显著电荷积累是倒置的OSC的低I-V性能的原因。因此，Maxwell-Wagner型界面充电，这是由C60的电导率，可以导致的OSCs的I-V性能的退化。保护C60层不受电导率下降的影响是提高OSCs性能的一个途径。
The origin of interfacial charging process in double-layer organic solar cells (OSCs) was studied by using the normal structure of Indium–Zinc–Oxide/pentacene/C60/Al and its inverted double-layer system. Optical electric-field-induced second-harmonic generation (EFISHG) measurement was employed and results suggested that interfacial charging in these two kinds of OSCs led to charge accumulation with opposite charge polarity, owing to the conductivity decrease of C60layer. Applying the EFISHG measurements to the inverted OSCs also showed that the significant charge accumulation on donor–acceptor interface is responsible for the lowI–Vperformance of the inverted OSCs. Thus, Maxwell–Wagner type interfacial charging, which is governed by the conductivity of C60, can cause the degradation of theI–Vperformance of OSCs. The protection of C60layer from the conductivity decrease is a way to improve OSCs performance.