Efficient tandem solar cells with solution-processed perovskite on textured crystalline silicon

Yi Hou, Erkan Aydin, Michele de Bastiani, Chuanxiao Xiao, Furkan Halis Isikgor, Ding-Jiang Xue, Bin Chen, Hao Chen, Behzad Bahrami, Ashraful H. Chowdhury, Andrew K. Johnston, Se-Woong Baek, Ziru Huang, Mingyang Wei, Yitong Dong, Joel Troughton, Rawan Jalmood, Alessandro J. Mirabelli, Thomas Allen, Emmanuel Van KerschaverMakhsud I. Saidaminov, Derya Baran, Qiquan Qiao, Kai Zhu, Stefaan De Wolf, E. Sargent

Research output: Contribution to journalArticlepeer-review

151 Scopus citations

Abstract

Stacking solar cells with decreasing band gaps to form tandems presents the possibility of overcoming the single-junction Shockley-Queisser limit in photovoltaics. The rapid development of solution-processed perovskites has brought perovskite single-junction efficiencies >20%. However, this process has yet to enable monolithic integration with industry-relevant textured crystalline silicon solar cells. We report tandems that combine solution-processed micrometer-thick perovskite top cells with fully textured silicon heterojunction bottom cells. To overcome the charge-collection challenges in micrometer-thick perovskites, we enhanced threefold the depletion width at the bases of silicon pyramids. Moreover, by anchoring a self-limiting passivant (1-butanethiol) on the perovskite surfaces, we enhanced the diffusion length and further suppressed phase segregation. These combined enhancements enabled an independently certified power conversion efficiency of 25.7% for perovskite-silicon tandem solar cells. These devices exhibited negligible performance loss after a 400-hour thermal stability test at 85°C and also after 400 hours under maximum power point tracking at 40°C.
Original languageEnglish (US)
Pages (from-to)1135-1140
Number of pages6
JournalScience
Volume367
Issue number6482
DOIs
StatePublished - Mar 6 2020

Fingerprint

Dive into the research topics of 'Efficient tandem solar cells with solution-processed perovskite on textured crystalline silicon'. Together they form a unique fingerprint.

Cite this