A generic interface to reduce the efficiency-stability-cost gap of perovskite solar cells

Journal article

A major bottleneck delaying the further commercialization of thin-film solar cells based on hybrid organohalide lead perovskites is interface loss in state-of-the-art devices. We present a generic interface architecture that combines solution-processed, reliable, and cost-efficient hole-transporting materials without compromising efficiency, stability, or scalability of perovskite solar cells. Tantalum-doped tungsten oxide (Ta-WO x )/conjugated polymer multilayers offer a surprisingly small interface barrier and form quasi-ohmic contacts universally with various scalable conjugated polymers. In a simple device with regular planar architecture and a self-assembled monolayer, Ta-WO x -doped interface-based perovskite solar cells achieve maximum efficiencies of 21.2% and offer more than 1000 hours of light stability. By eliminating additional ionic dopants, these findings open up the entire class of organics as scalable hole-transporting materials for perovskite solar cells.

Authors: Hou, Y; Du, X; Scheiner, S; McMeekin, DP; Wang, Z

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: American Association for the Advancement of Science
• Journal: Science
• Volume: 358
• Issue: 6367
• Pages: 1192-1197
• Publication date: 2017-12-01
• Acceptance date: 2017-10-27
• DOI: 10.1126/science.aao5561
• EISSN: 1095-9203
• ISSN: 0036-8075
• Pmid: 29123021
• Language: English
• Keywords: Journal Article; Research Support, Non-U.S. Gov't