Streamlined Phase Transition and Reaction Compensation in Hybrid Evaporation-Solution Deposited Inverted Perovskite Solar Cells

IF 24.4 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
Jiahao Wang, Yuan Zhou, Wei Ai, Dexin Pu, Hongyi Fang, Shiqiang Fu, Hongling Guan, Wenlong Shao, Guoyi Chen, Weiwei Meng, Guojia Fang, Weijun Ke
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Abstract

Perovskite solar cells (PSCs) represent a promising technology for next-generation photovoltaics, yet scaling up from laboratory to industrial production via the solution spin-coating method encounters significant challenges. Vacuum deposition offers a potential alternative but struggles with controlling perovskite phases and ensuring sufficient precursor reactions. Here, the study presents a hybrid evaporation-solution approach using a large cation-based pseudo-halogen anion salt (guanidine thiocyanate) and a compensating cation salt (methylammonium iodide) as co-additives to finely modulate the phase transition process. This approach eliminates the need for intermediate-phase transitions, promotes sufficient precursor reactions, and facilitates the formation of highly oriented α-phase perovskites prior to annealing. Consequently, it prevents detrimental δ-phase formation, yielding enlarged, homogeneous perovskite grains with significantly reduced defects. The resulting p-i-n-structured PSCs achieve a maximum efficiency of 24.72% and a low open-circuit voltage loss of 0.377 V, coupled with significantly improved stability. The work integrates the advantages of vacuum deposition and solution processing, providing new insights into perovskite phase transitions and paving the way for the efficient, scalable production of high-performance PSCs.

Abstract Image

蒸发-溶液混合沉积倒钙钛矿太阳能电池流线型相变与反应补偿
钙钛矿太阳能电池(PSCs)代表了下一代光伏发电的一项有前途的技术,但通过溶液旋转涂层方法从实验室扩展到工业生产遇到了重大挑战。真空沉积提供了一种潜在的替代方法,但在控制钙钛矿相和确保足够的前驱反应方面存在困难。在这里,该研究提出了一种混合蒸发-溶液方法,使用大阳离子基伪卤素阴离子盐(胍硫氰酸酯)和补偿阳离子盐(甲基碘化铵)作为共添加剂来精细调节相变过程。这种方法消除了中间相变的需要,促进了充分的前驱体反应,并有利于在退火前形成高取向α-相钙钛矿。因此,它可以防止有害的δ相形成,产生较大的、均匀的钙钛矿晶粒,缺陷显著减少。由此得到的p-i-n结构的PSCs最高效率为24.72%,开路电压损失低至0.377 V,同时稳定性显著提高。这项工作整合了真空沉积和溶液处理的优势,为钙钛矿相变提供了新的见解,并为高效、可扩展的高性能psc生产铺平了道路。
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来源期刊
Advanced Energy Materials
Advanced Energy Materials CHEMISTRY, PHYSICAL-ENERGY & FUELS
CiteScore
41.90
自引率
4.00%
发文量
889
审稿时长
1.4 months
期刊介绍: Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small. With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics. The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.
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