C60 as an Efficient n-Type Compact Layer in Perovskite Solar Cells

详细信息    查看全文

• 作者：Konrad Wojciechowski ; Tomas Leijtens ; Svetlana Siprova ; Christoph Schlueter ; Maximilian T. H枚rantner ; Jacob Tse-Wei Wang ; Chang-Zhi Li ; Alex K.-Y. Jen ; Tien-Lin Lee ; Henry J. Snaith
• 刊名：The Journal of Physical Chemistry Letters
• 出版年：2015
• 出版时间：June 18, 2015
• 年：2015
• 卷：6
• 期：12
• 页码：2399-2405
• 全文大小：361K
• ISSN：1948-7185

文摘

Organic鈥搃norganic halide perovskite solar cells have rapidly evolved over the last 3 years. There are still a number of issues and open questions related to the perovskite material, such as the phenomenon of anomalous hysteresis in current鈥搗oltage characteristics and long-term stability of the devices. In this work, we focus on the electron selective contact in the perovskite solar cells and physical processes occurring at that heterojunction. We developed efficient devices by replacing the commonly employed TiO₂ compact layer with fullerene C₆₀ in a regular n鈥搃鈥損 architecture. Detailed spectroscopic characterization allows us to present further insight into the nature of photocurrent hysteresis and charge extraction limitations arising at the n-type contact in a standard device. Furthermore, we show preliminary stability data of perovskite solar cells under working conditions, suggesting that an n-type organic charge collection layer can increase the long-term performance.