电致发光
吸收(声学)
材料科学
吸收光谱法
薄膜
光电子学
谱线
发射光谱
光谱学
有机太阳能电池
图层(电子)
光学
纳米技术
物理
复合材料
聚合物
量子力学
天文
作者
Tom P. A. van der Pol,Kunal Datta,Martijn M. Wienk,René Janssen
出处
期刊:Solar RRL
[Wiley]
日期:2022-10-26
卷期号:6 (12)
标识
DOI:10.1002/solr.202200872
摘要
Thin‐film organic and perovskite solar cells have seen tremendous advances in recent years. A common technique to characterize the low‐energy states in these solar cells is electroluminescence spectroscopy. Stemming from their thin film nature, however, the outcoupled electroluminescence spectra of these devices are affected by cavity effects and self‐absorption. Herein, a modeling approach is developed taking into account self‐absorption, cavity effects, and a nonhomogeneous emission profile, to correct the outcoupled spectrum, thereby yielding the intrinsically emitted spectrum. The modeling approach is then employed to structurally investigate the impact of these effects for a variety of active layer thicknesses, complex refractive indices, device structures, and emission profiles. The data presented uncover trends and provide guidelines that enable gauging the impact of self‐absorption and cavity effects on the electroluminescence spectra of a large set of thin‐film devices.
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