DataVXACS Energy LettersPaper
journal article·2022-01-14

Lead-Free Perovskite Solar Cells with Over 10% Efficiency and Size 1 cm2 Enabled by Solvent–Crystallization Regulation in a Two-Step Deposition Method

Xiao Liu, Tianhao Wu, Xinhui Luo, Haibin Wang, Miwako Furue, Takeru Bessho, Yiqiang Zhang, Jotaro Nakazaki, Hiroshi Segawa, Liyuan Han

ACS Energy Letters· Volume 7· Issue 1
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Source abstract

Abstract

The efficiency of tin perovskite solar cells (TPSCs) decreases largely with increased cell area because of the inhomogeneity of the tin perovskite films formed by a one-step deposition method. Here, we apply a two-step deposition method that is rarely used in TPSCs to solve this problem. We study the steric hindrance of four different solvent molecules in the second step on the crystallization process of tin perovskites and find that the increased steric hindrance to hydroxyl in solvent molecules contributes to dense and homogeneous tin perovskite films. In comparison to the films fabrication by a one-step deposition, the tin perovskite films fabricated by the two-step deposition exhibit a higher uniformity in both the horizontal and longitudinal directions. As a result, over 10% power conversion efficiency of TPSCs was achieved with a cell size of over 1 cm2. The cell maintained over 92% of its initial efficiency after operation under 1 sun illumination for 1000 h.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materialsMaterials processing

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.

Affiliations

Special Division of Environmental and Energy Science, Komaba Organization for Educational Excellence (KOMEX), College of Arts and Sciences, University of Tokyo, Tokyo 153-8902, Japan

State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University,800 Dong Chuan Road, Shanghai 200240, People’s Republic of China

Department of General System Studies, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 113-8654, Japan

Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Tokyo 113-8654, Japan

School of Materials Science and Engineering, Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou 450001, People’s Republic of China

Funding

New Energy and Industrial Technology Development Organization · Japan Society for the Promotion of Science · National Natural Science Foundation of China

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