I-Corps: Solution-Processed, High-Quality Indium Tin Oxide (ITO) Films for Perovskite-Based Tandem Solar Cells

I-Corps：用于钙钛矿串联太阳能电池的溶液加工高品质氧化铟锡 (ITO) 薄膜

• 批准号: 2041928
• 负责人: Dawen Li
• 金额: $ 5万
• 依托单位: University of Alabama Tuscaloosa
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-08-01 至 2023-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2041928&HistoricalAwards=false
• 关键词: Corps; Solution; Processed; Quality; Indium

The broader impact/commercial potential of this I-Corps project is the development of new solar cells. Lightweight and flexible solar panels are attractive because of high power output, and easy transportation and installation for a given space. Currently, such solar panels on the market offer efficiencies of only 15%. The goal of the proposed technology is to provide a light-weight solar panel with high power output and long lifespan that also may reduce operational cost in electricity or generate excess electricity. This project will explore applications for residential, agricultural, and other users. This I-Corps project is based on the development of a solution-processed, high-quality transparent electrode for perovskite-based tandem solar cells. In perovskite-based tandem solar cells, transparent indium tin oxide (ITO) thin films are employed to serve as the top contact and/or interconnecting layer between top and bottom sub-cells. To realize low-cost fabrication of perovskite solar panels through roll-to-roll printing in an ambient environment, room-temperature solution-processed ITO is desirable. However, with commonly used hotplate annealing, ITO thin films are subjected to high temperatures for long durations, up to several hours at a time, to attain high-quality film. Since a hotplate heats all stacking layers simultaneously, the flexible substrates and perovskite absorber layer may be damaged because of the limited temperature resistance. The proposed technology uses photonic irradiation to achieve rapid and layer-specific annealing for transparent ITO film without damaging the underlying stacking layers. Unlike hotplate heating in which each layer shares the same temperature via thermal conduction, photonic treatment may selectively supply energy to a specific layer through photon absorption. The capability to achieve high-quality solution-processed ITO enabled by rapid and layer-specific photonic annealing paves the way for large-volume manufacturing of perovskite-based tandem solar cells by high-speed roll-to-roll printing.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这个i-Corps项目的更广泛的影响/商业潜力是开发新的太阳能电池。轻便而灵活的太阳能电池板具有吸引力，因为它具有高功率输出，并且在特定空间内易于运输和安装。目前，市场上的这类太阳能电池板的效率只有15%。这项拟议技术的目标是提供一种重量轻、功率输出高、寿命长的太阳能电池板，同时还可以降低电力运营成本或产生过剩电力。该项目将探索住宅、农业和其他用户的应用程序。这个i-Corps项目是基于开发一种用于钙钛矿型串联太阳能电池的溶液处理的高质量透明电极。在钙钛矿型串联太阳电池中，透明的氧化铟锡(ITO)薄膜被用来作为上下两个子电池之间的顶部接触层和/或互连层。为了实现在环境中通过卷对卷印刷低成本地制造钙钛矿型太阳能电池板，室温溶液处理的ITO是可取的。然而，使用常用的热板退火法，ITO薄膜需要经过长时间的高温处理，一次最多几个小时，以获得高质量的薄膜。由于电热板同时加热所有堆积层，柔性基板和钙钛矿吸收层可能会因为有限的温度电阻而损坏。该技术利用光子辐照，在不破坏底层堆积层的情况下，实现了透明ITO薄膜的快速和特定于层的退火。与热板加热不同，热板加热的每一层都通过热传导分享相同的温度，而光子处理可以通过光子吸收选择性地向特定的层提供能量。通过快速和特定于层的光子退火实现高质量溶液处理的ITO的能力，为通过高速卷到卷印刷大规模生产钙钛矿基串联太阳能电池铺平了道路。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。