Solution-Processed, Ultrathin Solar Cells from CdCl3–-Capped CdTe Nanocrystals: The Multiple Roles of CdCl3– Ligands

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• 作者：Hao Zhang ; J. Matthew Kurley ; Jake C. Russell ; Jaeyoung Jang ; Dmitri V. Talapin
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：June 22, 2016
• 年：2016
• 卷：138
• 期：24
• 页码：7464-7467
• 全文大小：301K
• 年卷期：0
• ISSN：1520-5126

文摘

Solution-processed CdTe solar cells using CdTe nanocrystal (NC) ink may offer an economically viable route for large-scale manufacturing. Here we design a new CdCl₃^–-capped CdTe NC ink by taking advantage of novel surface chemistry. In this ink, CdCl₃^– ligands act as surface ligands, sintering promoters, and dopants. Our solution chemistry allows obtaining very thin continuous layers of high-quality CdTe which is challenging for traditional vapor transport methods. Using benign solvents, in air, and without additional CdCl₂ treatment, we obtain a well-sintered CdTe absorber layer from the new ink and demonstrate thin-film solar cells with power conversion efficiency over 10%, a record efficiency for sub-400 nm thick CdTe absorber layer.