Tl3PbI5 Nanocrystals for Ultraviolet Photovoltaics

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Electronic Materials Letters Pub Date : 2024-05-04 DOI:10.1007/s13391-024-00499-8

Wooyeon Kim, Bonkee Koo, Jaeyeon Kim, In Choi, Seongyeon Hwang, Min Jae Ko

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Abstract

Tl₃PbI₅ exhibits a bandgap energy suitable for absorbing visible and ultraviolet spectra along with a high absorption capability, rendering it a promising candidate for a broader range of solar energy applications. However, its applicability as a light absorber in solar cells is yet to be experimentally confirmed. In this study, we systemically investigate the synthesis process and the crystallographic and chemical properties of Tl₃PbI₅ nanocrystals. These results enable the optimization of Tl₃PbI₅ nanocrystals for use as a light absorber. In addition, a solid-state ligand exchange method employing methyl acetate (MeOAc) is introduced to construct a Tl₃PbI₅ absorption layer for photovoltaic applications. This method facilitates the preparation of multilayer thin films with precise thickness control. The optimally designed Tl₃PbI₅-based solar cell achieves a power conversion efficiency (PCE) of 0.20%. Furthermore, the device retains over 90% of its PCE after 2000 h at 25 °C and 60% relative humidity, indicating the potential of Tl₃PbI₅-based photovoltaics for reliable solar energy harvesting.

Graphical Abstract

Abstract Image

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用于紫外线光伏的 Tl3PbI5 纳米晶体

Tl3PbI5 具有适合吸收可见光和紫外线光谱的带隙能量以及高吸收能力，因此有望在更广泛的太阳能应用领域大显身手。然而，它在太阳能电池中作为光吸收剂的适用性还有待实验证实。在本研究中，我们系统地研究了 Tl3PbI5 纳米晶体的合成过程、晶体学和化学特性。这些结果有助于优化 Tl3PbI5 纳米晶体作为光吸收剂的用途。此外，还介绍了一种采用醋酸甲酯（MeOAc）的固态配体交换方法，以构建用于光伏应用的 Tl3PbI5 吸收层。这种方法有助于制备具有精确厚度控制的多层薄膜。经过优化设计的基于 Tl3PbI5 的太阳能电池实现了 0.20% 的功率转换效率 (PCE)。此外，该装置在 25 °C 和 60% 相对湿度条件下工作 2000 小时后，其 PCE 仍保持在 90% 以上，这表明基于 Tl3PbI5 的光伏器件具有可靠的太阳能收集潜力。

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来源期刊

Electronic Materials Letters 工程技术-材料科学：综合

CiteScore

4.70

自引率

20.80%

发文量

审稿时长

2.3 months

期刊介绍： Electronic Materials Letters is an official journal of the Korean Institute of Metals and Materials. It is a peer-reviewed international journal publishing print and online version. It covers all disciplines of research and technology in electronic materials. Emphasis is placed on science, engineering and applications of advanced materials, including electronic, magnetic, optical, organic, electrochemical, mechanical, and nanoscale materials. The aspects of synthesis and processing include thin films, nanostructures, self assembly, and bulk, all related to thermodynamics, kinetics and/or modeling.