Laser Crystallization of Organic–Inorganic Hybrid Perovskite Solar Cells

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• 作者：Taewoo Jeon ; Hyeong Min Jin ; Seung Hyun Lee ; Ju Min Lee ; Hyung Il Park ; Mi Kyung Kim ; Keon Jae Lee ; Byungha Shin ; Sang Ouk Kim
• 刊名：ACS Nano
• 出版年：2016
• 出版时间：August 23, 2016
• 年：2016
• 卷：10
• 期：8
• 页码：7907-7914
• 全文大小：518K
• 年卷期：0
• ISSN：1936-086X

文摘

Organic–inorganic hybrid perovskites attract enormous research interest for next generation solar energy harvest. Synergistic crystalline structures comprising organic and inorganic components enable solution processing of perovskite films. A reliable crystallization method for perovskites, compatible with fast continuous process over large-area flexible substrates, is crucial for high performance solar cell production. Here, we present laser crystallization of hybrid perovskite solar cells using near-infrared (NIR) laser (λ = 1064 nm). Crystalline morphology of CH₃NH₃PbI₃ (MAPbI₃) perovskite films are widely controllable with laser irradiation condition while maintaining film uniformity. Photothermal heating effectively assisted by interfacial photoconversion layers is critical for phase transformation without beam damage of multilayered device structures. Notably, laser crystallization attains higher device performances than conventional thermal annealing. Fast laser crystallization with manufacture level scan rate (1 m min^–1) demonstrates inverted-type perovskite solar cells with 11.3 and 8.0% efficiencies on typical glass and flexible polymer substrates, respectively, without rigorous device optimization.