{"title":"Sulfur-enhanced surface passivation for hole-selective contacts in crystalline silicon solar cells","authors":"Yanhao Wang, Yirong Geng, Hongwei Hao, Wei Ren, Hai Zhang, Jingjie Li, Yongzhe Zhang, Jilei Wang, Shaojuan Bao, Hui Wang, Shan-Ting Zhang, Dongdong Li","doi":"10.1016/j.xcrp.2024.102199","DOIUrl":null,"url":null,"abstract":"<p>Effective surface passivation is pivotal for achieving high performance in crystalline silicon (<em>c</em>-Si) solar cells. However, many passivation techniques in solar cells involve high temperatures and cost. Here, we report a low-cost and easy-to-implement sulfurization treatment as a surface passivation strategy. By treating <em>p</em>-type <em>c</em>-Si (<em>p</em>-Si) wafers with (NH<sub>4</sub>)<sub>2</sub>S solution, sulfur can be introduced onto the surface and passivate the dangling bonds by forming an Si–S bond. Sulfurization also contributes to a higher negative fixed charge at the <em>p</em>-Si/Al<sub>2</sub>O<sub>3</sub> interface and, thus, better field-effect passivation. Due to the improved passivation, sulfurization effectively enhances hole selectivity, evidenced by the substantially improved open-circuit voltage and efficiency of solar cells. Eventually, by employing sulfurization in hole-selective contacts, remarkable efficiencies of 19.85% and 22.01% are attained for NiO<sub>x</sub>- and MoO<sub>x</sub>-based passivating contact <em>c</em>-Si solar cells, respectively. Our work highlights a promising sulfurization strategy to enhance surface passivation and hole selectivity for dopant-free <em>c</em>-Si solar cells.</p>","PeriodicalId":9703,"journal":{"name":"Cell Reports Physical Science","volume":null,"pages":null},"PeriodicalIF":7.9000,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cell Reports Physical Science","FirstCategoryId":"103","ListUrlMain":"https://doi.org/10.1016/j.xcrp.2024.102199","RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Effective surface passivation is pivotal for achieving high performance in crystalline silicon (c-Si) solar cells. However, many passivation techniques in solar cells involve high temperatures and cost. Here, we report a low-cost and easy-to-implement sulfurization treatment as a surface passivation strategy. By treating p-type c-Si (p-Si) wafers with (NH4)2S solution, sulfur can be introduced onto the surface and passivate the dangling bonds by forming an Si–S bond. Sulfurization also contributes to a higher negative fixed charge at the p-Si/Al2O3 interface and, thus, better field-effect passivation. Due to the improved passivation, sulfurization effectively enhances hole selectivity, evidenced by the substantially improved open-circuit voltage and efficiency of solar cells. Eventually, by employing sulfurization in hole-selective contacts, remarkable efficiencies of 19.85% and 22.01% are attained for NiOx- and MoOx-based passivating contact c-Si solar cells, respectively. Our work highlights a promising sulfurization strategy to enhance surface passivation and hole selectivity for dopant-free c-Si solar cells.
期刊介绍:
Cell Reports Physical Science, a premium open-access journal from Cell Press, features high-quality, cutting-edge research spanning the physical sciences. It serves as an open forum fostering collaboration among physical scientists while championing open science principles. Published works must signify significant advancements in fundamental insight or technological applications within fields such as chemistry, physics, materials science, energy science, engineering, and related interdisciplinary studies. In addition to longer articles, the journal considers impactful short-form reports and short reviews covering recent literature in emerging fields. Continually adapting to the evolving open science landscape, the journal reviews its policies to align with community consensus and best practices.