Self-Absorption Analysis of Perovskite-Based Luminescent Solar Concentrators

Yujian Sun, Yongcao Zhang, Yuxin Li, Yilin Li
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Abstract

Luminescent solar concentrators (LSCs) are considered promising in their application as building-integrated photovoltaics (BIPVs). However, they suffer from low performance, especially in large-area devices. One of the key issues is the self-absorption of the luminophores. In this report, we focus on the study of self-absorption in perovskite-based LSCs. Perovskite nanocrystals (NCs) are emerging luminophores for LSCs. Studying the self-absorption of perovskite NCs is beneficial to understanding fundamental photon transport properties in perovskite-based LSCs. We analyzed and quantified self-absorption properties of perovskite NCs in an LSC with the dimensions of 6 in × 6 in × 1/4 in (152.4 mm × 152.4 mm × 6.35 mm) using three approaches (i.e., limited illumination, laser excitation, and regional measurements). The results showed that a significant number of self-absorption events occurred within a distance of 2 in (50.8 mm), and the photo surface escape due to the repeated self-absorption was the dominant energy loss mechanism.
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钙钛矿基发光太阳能聚光器的自吸收分析
发光太阳能聚光器(LSCs)在建筑集成光伏(bipv)中具有广阔的应用前景。然而,它们的性能较低,特别是在大面积设备中。其中一个关键问题是发光团的自吸收。在本报告中,我们主要研究钙钛矿基LSCs的自吸收。钙钛矿纳米晶体(NCs)是一种新兴的LSCs发光材料。研究钙钛矿NCs的自吸收特性有助于理解钙钛矿LSCs的基本光子输运特性。我们使用三种方法(即有限光照、激光激发和区域测量)分析和量化了尺寸为6英寸× 6英寸× 1/4英寸(152.4 mm × 152.4 mm × 6.35 mm)的LSC中钙钛矿NCs的自吸收特性。结果表明,在2 in (50.8 mm)范围内发生了大量的自吸收事件,由于重复自吸收引起的光表面逃逸是主要的能量损失机制。
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