Microcavity-Enhanced Light-Trapping for Highly Efficient Organic Parallel Tandem Solar Cells

• Published in: Advanced materials (Weinheim) Vol. 26; no. 39; pp. 6778 - 6784
• Main Authors: Zuo, Lijian, Chueh, Chu-Chen, Xu, Yun-Xiang, Chen, Kung-Shih, Zang, Yue, Li, Chang-Zhi, Chen, Hongzheng, Jen, Alex K.-Y.
• Format: Journal Article
• Language: English
• Published: Germany Blackwell Publishing Ltd 22.10.2014
• Subjects: Architecture; efficient light absorption; micro-cavity effect; Microcavities; Organic materials; organic photovoltaics; parallel tandem solar cells; Photovoltaic cells; semitransparent electrode; Silver; Solar cells; Tandem configuration; Utilization; micro-cavity effect; parallel tandem solar cells; efficient light absorption; semitransparent electrode; organic photovoltaics
• ISSN: 0935-9648; 1521-4095; 1521-4095
• DOI: 10.1002/adma.201402782

A high‐performance parallel tandem solar cell employing ultra‐thin Ag as the intermediate anode is demonstrated, which comprises a semitransparent front sub‐cell and a microcavity assisted back sub‐cell. In addition to the extended optical field as a result of the tandem architecture, the prominent microcavity resonance formed in the back sub‐cell enables such a parallel tandem configuration to possess high light utilization efficiency (the peak EQE value is over 80%) and a high photovoltaic performance of 9.2%. This study establishes an effective architecture that can be generally applicable to all organic materials for improving their performance.