The impact of P(NDI2OD-T2) crystalline domains on the open-circuit voltage of bilayer all-polymer solar cells with an inverted configuration

被引：13
作者：
Kim, Yu Jin [1 ]
Park, Chan Eon [1 ]
机构：
[1] Pohang Univ Sci & Technol, POSTECH Organ Elect Lab, Dept Chem Engn, Pohang 790784, South Korea
来源：
APL MATERIALS | 2015年 / 3卷 / 12期
基金：
新加坡国家研究基金会;
关键词：
POWER CONVERSION EFFICIENCY; ACTIVE LAYER MORPHOLOGY; BULK HETEROJUNCTION; PHOTOVOLTAIC DEVICES; PERFORMANCE;
D O I：
10.1063/1.4937469
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We fabricated P(NDI2OD-T2)/PTB7 bilayer all-polymer solar cells with an inverted configuration, where the annealing temperature was systematically varied. The current density-voltage behavior was investigated and the structural properties of the P(NDI2OD-T2) layers were characterized. Absorption spectroscopy, surface morphology, and crystallite analysis showed that increasing phase segregation of P(NDI2OD-T2) films occurred as the annealing temperature increased. We found that, as the P(NDI2OD-T2) stacking improved, with larger domains, the open-circuit voltage decreased and the saturation dark current density increased. This work provides a guide for the processing of P(NDI2OD-T2) layers to maximize the power conversion efficiency of all-polymer solar cells. (C) 2015 Author(s).
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页数：8
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