Recently, the bulk heterojunction (BHJ)-based photoactive layer has been favored over the planar heterojunction (PHJ)-based photoactive layer for organic photovoltaics (OPVs), owing to the evitable thickness limit of the latter induced by the low mobility of charge carriers. However, under dim indoor light conditions, the PV performance becomes immune to the resistive components of the PHJ OPVs, such as a thick photoactive layer, thereby rendering them attractive for operating indoors. In this study, we devise and demonstrate indoor OPVs with a PHJ-based photoactive layer constituting poly(3-hexylthiophene-2,5-diyl) (P3HT) and indene-C60 bisadduct (ICBA). The performance of the PHJ OPVs was optimized by modulating the thickness of the ICBA layer under a 1000 lx light-emitting diode lamp. OPVs with a 65 nm-thick ICBA layer exhibited excellent indoor performance with a power conversion efficiency of 15.3 ± 0.3%, comparable to that of the reference BHJ OPVs (15.0 ± 0.2%). No noticeable performance degradation was observed by increasing the thickness of the PHJ-based photoactive layer; instead, a thick photoactive layer only enhanced the light absorption, resulting in excellent indoor performance with a higher photocurrent.

中文翻译：

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研究基于平面异质结的有机光伏的室内性能


最近，基于体异质结（BHJ）的光敏层比基于平面异质结（PHJ）的光敏层在有机光伏（OPV）中受到青睐，因为后者由于电荷载流子的低迁移率而不可避免地受到厚度限制。 。然而，在昏暗的室内光线条件下，PV 性能不受 PHJ OPV 电阻组件（例如厚光敏层）的影响，从而使它们在室内运行时具有吸引力。在这项研究中，我们设计并演示了具有由聚（3-己基噻吩-2,5-二基）（P3HT）和茚-C60双加合物（ICBA）组成的基于PHJ的光活性层的室内OPV。通过在 1000 lx 发光二极管灯下调节 ICBA 层的厚度来优化 PHJ OPV 的性能。具有 65 nm 厚 ICBA 层的 OPV 表现出优异的室内性能，功率转换效率为 15.3 ± 0.3%，与参考 BHJ OPV (15.0 ± 0.2%) 相当。通过增加基于 PHJ 的光活性层的厚度，没有观察到明显的性能下降；相反，厚的光活性层只会增强光吸收，从而产生优异的室内性能和更高的光电流。