| Autor: |
Roe, Jina, Son, Jung Geon, Park, Sujung, Seo, Jongdeuk, Song, Taehee, Kim, Jaehyeong, Oh, Si On, Jo, Yeowon, Lee, Yeonjeong, Shin, Yun Seop, Jang, Hyungsu, Lee, Dongmin, Yuk, Dohun, Seol, Jin Gyu, Kim, Yung Sam, Cho, Shinuk, Kim, Dong Suk, Kim, Jin Young |
| Zdroj: |
ACS Nano; September 2024, Vol. 18 Issue: 35 p24306-24316, 11p |
| Abstrakt: |
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. |
| Databáze: |
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