Effects of Photonic Curing Processing Conditions on MAPbI₃ Film Properties and Solar Cell Performance

Journal Article · Fri Aug 14 00:00:00 EDT 2020 · ACS Applied Energy Materials

DOI:https://doi.org/10.1021/acsaem.0c01243· OSTI ID:1656905

Xu, Weijie ^[1]; Daunis, Trey B. ^[2]; Piper, Robert T. ^[2]; Hsu, Julia W.P. ^[2]

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1. Univ. of Texas at Dallas, Richardson, TX (United States); University of Texas at Dallas
2. Univ. of Texas at Dallas, Richardson, TX (United States)

Thermal annealing is the most used postdeposition materials processing method in laboratory research, but due to its slow speed and high energy cost, it is not compatible with the upscaling and commercialization of perovskite solar cell (PSC) manufacturing. Here, we adapt photonic curing (PC), which uses millisecond light pulses to deliver energy to the sample, to replace thermal annealing for crystallization of methylammonium lead iodide (MAPbI₃) films and rapid fabrication of PSCs. We study how PC conditions affect the outcome of MAPbI₃ conversion from the precursor to the crystalline perovskite phase by evaluating the films’ optical, crystalline, and morphological properties, as well as PSC performance. The results are understood using simulated film temperature profiles. We show that MAPbI₃ is readily converted under a wide range of PC conditions. While previous reports all used short pulses (<3 ms), we find that longer pulses produce more dense films and higher-performing PSCs. We achieve a champion power conversion efficiency in a PC-processed MAPbI₃ PSC of 11.26% under forward scan and 10.34% under reverse scan, with the processing time for the MAPbI₃ layer reduced by 30,000-fold, from 10 min to 20 ms. Using a 6 in. lamp, spatial uniformity tests show a cross-web efficiency variation of 5%. Our results indicate that using longer pulse lengths, >10 ms, is the best PC strategy for perovskite conversion, and PC is a promising annealing method for large-area, high-throughput PSC manufacturing.

• Research Organization: Univ. of Texas at Dallas, Richardson, TX (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
• Grant/Contract Number: EE0008544
• OSTI ID: 1656905
• Journal Information: ACS Applied Energy Materials, Journal Name: ACS Applied Energy Materials Journal Issue: 9 Vol. 3; ISSN 2574-0962
• Publisher: American Chemical Society (ACS)
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY