Thin-film semiconductor perspective of organometal trihalide perovskite materials for high-efficiency solar cells

详细信息    查看全文

• 作者：Zhengguo Xiao ; Yongbo Yuan ; Qi Wang ; Yuchuan Shao ; Yang Bai ; Yehao Deng ; Qingfeng Dong ; Miao Hu ; Cheng Bi ; Jinsong Huang ; ^{jhuang2@unl.edu" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Organometal trihalide perovskites ; Optoelectronic property ; Solar cells ; Efficiency enhancement ; Morphology control ; Photocurrent hysteresis ; Stability
• 刊名：Materials Science and Engineering: R: Reports
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：101
• 期：Complete
• 页码：1-38
• 全文大小：11611 K

文摘

Organometal trihalide perovskites (OTPs) are arising as a new generation of low-cost active materials for solar cells with efficiency rocketing from 3.5% to over 20% within only five years. From “dye” in dye-sensitized solar cells (DSSCs) to “hole conductors” and “electron conductors” in mesoscopic heterojunction solar cells, there has been a dramatic conceptual evolution on the function of OTPs in photovoltaic devices. OTPs were originally used as dyes in Grätzel cells, achieving a high efficiency above 15% which, however, did not manifest the excellent charge transport properties of OTPs. An analogy of OTPs to traditional semiconductors was drawn after the demonstration of highly efficient planar heterojunction structure OTP devices and the observation of their excellent bipolar transport properties with a large diffusion length exceeding 100 nm in CH₃NH₃PbI₃ (MAPbI₃) polycrystalline thin films. This review aims to provide the most recent advances in the understanding of the origin of the high OTP device efficiency. Specifically, we will focus on reviewing the progress in understanding (1) the characterization of fantastic optoelectronic property of OTPs, (2) the unusual defect physics that originate the optoelectronic property, (3) morphology control of the perovskite film from fabrication process and film post-treatment, (4) device interface and charge transport layers that dramatically impact device efficiency in the OTP thin-film devices, (5) photocurrent hysteresis, (6) tandem solar cells and (7) stability of the perovskite materials and solar cell devices.