Controllable Methylamine Vapor Treatment for Improving Performance of Vapor-Processed Perovskite Solar Cells

IF 3.7 3区工程技术 Q3 ENERGY & FUELS

IEEE Journal of Photovoltaics Pub Date : 2025-11-01 Epub Date: 2025-09-16 DOI:10.1109/JPHOTOV.2025.3604874

Chaiwarut Santiwipharat;Austin G. Kuba;Kevin D. Dobson;Ujjwal K. Das;William N. Shafarman

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引用次数: 0

Abstract

While the development of methylammonium lead iodide (

${\mathrm{MAPbI}}_{3}$

) perovskite in photovoltaic research has matured for solution-based fabrication methods, the growth of high-quality material from vapor processes continues to be difficult due to challenges in vapor chemistry control. Postdeposition methylamine (MA) vapor treatment is an approach to improve the morphology and crystallinity of

${\mathrm{MAPbI}}_{3}$

films, producing highly oriented, large-grain perovskite films. Herein, experiments to characterize the effects of substrate temperature, MA partial pressure, and MA exhaust flow rate on the liquefaction and recrystallization processes that occur during MA treatments are described. Improved morphology and crystallinity following MA treatment indicate that substrate temperature plays a significant role in both processes during treatment. The enhancement in electronic properties after treatment is confirmed by steady-state and time-resolved photoluminescence spectroscopy. The solar cells made from the films treated at the optimal treatment conditions have shown open circuit voltages over 1 V and fill factors up to 70%. The result of this study is a useful pathway for the fabrication of high-quality

${\mathrm{MAPbI}}_{3}$

films via all-vapor process manufacturing.

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可控甲胺蒸汽处理提高蒸汽处理钙钛矿太阳能电池性能

虽然光伏研究中甲基碘化铅（${\ mathm {MAPbI}}_{3}$）钙钛矿的发展已经成熟，可以采用基于溶液的制造方法，但由于蒸汽化学控制方面的挑战，从蒸汽工艺中生长高质量材料仍然很困难。沉积后甲胺（MA）气相处理是改善${\ mathm {MAPbI}}_{3}$薄膜形貌和结晶度的一种方法，可以制备出高取向、大晶粒的钙钛矿薄膜。本文描述了基材温度、MA分压和MA排气流量对MA处理过程中发生的液化和再结晶过程的影响。MA处理后形貌和结晶度的改善表明，衬底温度在处理过程中对这两个过程都起着重要作用。稳态和时间分辨光致发光光谱证实了处理后电子性能的增强。在最佳处理条件下制备的太阳能电池显示开路电压超过1v，填充系数高达70%。本研究结果为采用全气相法制备高质量的${\ mathm {MAPbI}}_{3}$薄膜提供了有益的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Journal of Photovoltaics ENERGY & FUELS-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.00

自引率

10.00%

发文量

206

期刊介绍： The IEEE Journal of Photovoltaics is a peer-reviewed, archival publication reporting original and significant research results that advance the field of photovoltaics (PV). The PV field is diverse in its science base ranging from semiconductor and PV device physics to optics and the materials sciences. The journal publishes articles that connect this science base to PV science and technology. The intent is to publish original research results that are of primary interest to the photovoltaic specialist. The scope of the IEEE J. Photovoltaics incorporates: fundamentals and new concepts of PV conversion, including those based on nanostructured materials, low-dimensional physics, multiple charge generation, up/down converters, thermophotovoltaics, hot-carrier effects, plasmonics, metamorphic materials, luminescent concentrators, and rectennas; Si-based PV, including new cell designs, crystalline and non-crystalline Si, passivation, characterization and Si crystal growth; polycrystalline, amorphous and crystalline thin-film solar cell materials, including PV structures and solar cells based on II-VI, chalcopyrite, Si and other thin film absorbers; III-V PV materials, heterostructures, multijunction devices and concentrator PV; optics for light trapping, reflection control and concentration; organic PV including polymer, hybrid and dye sensitized solar cells; space PV including cell materials and PV devices, defects and reliability, environmental effects and protective materials; PV modeling and characterization methods; and other aspects of PV, including modules, power conditioning, inverters, balance-of-systems components, monitoring, analyses and simulations, and supporting PV module standards and measurements. Tutorial and review papers on these subjects are also published and occasionally special issues are published to treat particular areas in more depth and breadth.