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DOE OSTI · 1603223

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

Hou, Yi (ORCID:000000021532816X)·Aydin, Erkan (ORCID:0000000288492788)·De Bastiani, Michele (ORCID:0000000248702699)·Xiao, Chuanxiao·Isikgor, Furkan H. (ORCID:0000000307877991)·Xue, Ding-Jiang (ORCID:0000000275990008)·Chen, Bin·Chen, Hao·Bahrami, Behzad (ORCID:0000000203621430)·Chowdhury, Ashraful H. (ORCID:0000000168245897)·Johnston, Andrew (ORCID:000000024545532X)·Baek, Se-Woong (ORCID:0000000251970598)·Huang, Ziru (ORCID:000000017983913X)·Wei, Mingyang·Dong, Yitong (ORCID:0000000270693725)·Troughton, Joel·Jalmood, Rawan·Mirabelli, Alessandro J. (ORCID:0000000171014926)·Allen, Thomas G. (ORCID:0000000213365389)·Van Kerschaver, Emmanuel·Saidaminov, Makhsud I. (ORCID:000000023850666X)·Baran, Derya (ORCID:0000000321968187)·Qiao, Qiquan (ORCID:0000000245557887)·Zhu, Kai (ORCID:0000000309083909)·De Wolf, Stefaan (ORCID:0000000316199061)·Sargent, Edward H. (ORCID:0000000303966495)
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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.

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14 SOLAR ENERGY36 MATERIALS SCIENCEperovskitessilicon solar cellstextured siliconwide-band gap

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Hou, Yi (ORCID:000000021532816X), Aydin, Erkan (ORCID:0000000288492788), De Bastiani, Michele (ORCID:0000000248702699), Xiao, Chuanxiao, Isikgor, Furkan H. (ORCID:0000000307877991), Xue, Ding-Jiang (ORCID:0000000275990008), Chen, Bin, Chen, Hao, Bahrami, Behzad (ORCID:0000000203621430), Chowdhury, Ashraful H. (ORCID:0000000168245897), Johnston, Andrew (ORCID:000000024545532X), Baek, Se-Woong (ORCID:0000000251970598), Huang, Ziru (ORCID:000000017983913X), Wei, Mingyang, Dong, Yitong (ORCID:0000000270693725), Troughton, Joel, Jalmood, Rawan, Mirabelli, Alessandro J. (ORCID:0000000171014926), Allen, Thomas G. (ORCID:0000000213365389), Van Kerschaver, Emmanuel, Saidaminov, Makhsud I. (ORCID:000000023850666X), Baran, Derya (ORCID:0000000321968187), Qiao, Qiquan (ORCID:0000000245557887), Zhu, Kai (ORCID:0000000309083909), De Wolf, Stefaan (ORCID:0000000316199061), Sargent, Edward H. (ORCID:0000000303966495). 2020-03-05. Efficient tandem solar cells with solution-processed perovskite on textured crystalline silicon. https://doi.org/10.1126/science.aaz3691

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