Reconstructing the amorphous and defective surface for efficient and stable perovskite solar cells
Source abstract
Abstract
钙钛矿太阳能电池的表界面性质是影响器件效率和稳定性的关键因素. 本文中, 我们首次发现空穴传输层中的添加剂4-叔丁基吡啶(tBP)可将钙钛矿非晶态和缺陷表面层进行重结晶, 并且钝化晶粒表面的缺陷位. 该重构可使钙钛矿的表面功函数增大, 降低了钙钛矿与空穴传输层之间界面能级失配, 提高了器件的光电压. 进一步地, 我们通过化学键合强度计, 开发了更有效的空穴传输层添加剂4-叔丁基哌啶(tBPp), 它比tBP具有钙钛矿表面缺陷位点更强的相互作用. 得益于吸附能的增强, 经tBPp重构钙钛矿表面缺陷态密度降低, 且在热、光、湿度的作用下稳定性更好. 基tBPp作为添加剂的钙钛矿电池最高效率达到了24.2%. 在氮气气氛中进最大功率点跟踪测试, 未封装的设备在连续光照超过1200小时后几乎可以保持其初始效率. 本工作全面揭示了空穴传输层中添加剂对于钙钛矿池的效率和稳定性的重要性, 并提供了系统和基础性理解.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (47)
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