Hole Transport Role of Perovskite in Thick Film Perovskite Solar Cells without a Rear Blocking Layer

IF 6 3区 工程技术 Q2 ENERGY & FUELS
Solar RRL Pub Date : 2025-06-29 DOI:10.1002/solr.202500332
Seungmin Lee, Soyun Kim, Tae Won Lee, Oui Jin Oh, Dong Hyun Kim, Dong Hun Kang, Jun Hong Noh
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Abstract

Perovskite solar cells (PSCs) have achieved remarkable efficiencies, largely due to the use of nanoscale light-absorbing layers. This success has led to significant research into scalable fabrication processes for these thin films. Although microscale deposition techniques offer established benefits for large-area manufacturing, PSCs with thicker perovskite layers (exceeding 1 μm) typically exhibit lower efficiencies. This study aims to elucidate the fundamental factors limiting the efficiency of microscale perovskite light absorbers in solar cell devices, with the goal of leveraging the scalability of microscale deposition for high-performance PSCs. We also focused on the excellent hole-transporting properties of perovskites and evaluated their performance potential in the absence of a rear blocking layer (RBL). Thick perovskite films with thicknesses up to 7 μm were fabricated, and the performance of these RBL-free PSCs was assessed. Our results demonstrate that an RBL-free PSC with a thickness of 3 μm can achieve an efficiency approaching 13.83%. Notably, in these RBL-free PSCs, unlike conventional perovskite architectures, the thickness of the perovskite layer directly influences the recombination pathway, consequently leading to an increase in the open-circuit voltage. These findings highlight the importance of RBL-free thick-film PSCs and suggest their significant potential for the development of high-performance devices.

Abstract Image

无后阻挡层厚膜钙钛矿太阳能电池中钙钛矿的空穴输运作用
钙钛矿太阳能电池(PSCs)已经取得了显著的效率,很大程度上归功于纳米级吸光层的使用。这一成功导致了对这些薄膜的可扩展制造工艺的重大研究。尽管微尺度沉积技术为大面积制造提供了优势,但钙钛矿层较厚(超过1 μm)的PSCs通常表现出较低的效率。本研究旨在阐明限制太阳能电池器件中微尺度钙钛矿光吸收剂效率的基本因素,目的是利用微尺度沉积的可扩展性来生产高性能的PSCs。我们还关注了钙钛矿优异的空穴传输性能,并评估了它们在没有后阻挡层(RBL)的情况下的性能潜力。制备了厚度达7 μm的钙钛矿厚膜,并对其性能进行了评价。结果表明,厚度为3 μm的无rbl PSC的效率接近13.83%。值得注意的是,在这些不含rbl的psc中,与传统的钙钛矿结构不同,钙钛矿层的厚度直接影响复合途径,从而导致开路电压的增加。这些发现强调了不含rbl的厚膜psc的重要性,并表明它们在高性能器件开发方面的巨大潜力。
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来源期刊
Solar RRL
Solar RRL Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
12.10
自引率
6.30%
发文量
460
期刊介绍: Solar RRL, formerly known as Rapid Research Letters, has evolved to embrace a broader and more encompassing format. We publish Research Articles and Reviews covering all facets of solar energy conversion. This includes, but is not limited to, photovoltaics and solar cells (both established and emerging systems), as well as the development, characterization, and optimization of materials and devices. Additionally, we cover topics such as photovoltaic modules and systems, their installation and deployment, photocatalysis, solar fuels, photothermal and photoelectrochemical solar energy conversion, energy distribution, grid issues, and other relevant aspects. Join us in exploring the latest advancements in solar energy conversion research.
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