钝化
材料科学
钙钛矿(结构)
制作
单层
锡
能量转换效率
化学工程
纳米技术
光电子学
图层(电子)
冶金
工程类
医学
替代医学
病理
作者
Jina Roe,Jung Geon Son,Sujung Park,Jongdeuk Seo,Taehee Song,Jaehyeong Kim,Si On Oh,Y. S. Jo,Yeonjeong Lee,Yun Seop Shin,Hyungsu Jang,Dongmin Lee,Dohun Yuk,Jin Gyu Seol,Yung Sam Kim,Shinuk Cho,Dong Suk Kim,Jin Young Kim
出处
期刊:ACS Nano
[American Chemical Society]
日期:2024-08-22
标识
DOI:10.1021/acsnano.4c06396
摘要
Tin–lead (Sn–Pb) perovskite solar cells (PSCs) hold considerable potential for achieving efficiencies near the Shockley–Queisser (S–Q) limit. Notably, the inverted structure stands as the preferred fabrication method for the most efficient Sn–Pb PSCs. In this regard, it is imperative to implement a strategic customization of the hole selective layer to facilitate carrier extraction and refine the quality of perovskite films, which requires effective hole selectivity and favorable interactions with Sn–Pb perovskites. Herein, we propose the development of Co-Self-Assembled Monolayers (Co-SAM) by integrating both [2-(9H-carbazol-9-yl)ethyl]phosphonic acid (2PACz) and glycine at the buried contacts. The one-step deposition process employed in the fabrication of the Co-SAM ensures uniform coverage, resulting in a homogeneous surface potential. This is attributed to the molecular interactions occurring between 2PACz and glycine in the processing solution. Furthermore, the amine (−NH2) and ammonium (−NH3+) groups in glycine effectively passivate Sn4+ defects at the buried interface of Sn–Pb perovskite films, even under thermal stress. Consequently, the synergistic buried interface regulation of Co-SAM leads to a power conversion efficiency (PCE) of 23.46%, which outperforms devices modified with 2PACz or glycine alone. The Co-SAM-modified Sn–Pb PSC demonstrates enhanced thermal stability, maintaining 88% of its initial PCE under 65 °C thermal stress for 590 h.
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