Efficient and stable perovskite solar cells based on blade-coated CH3NH3PbI3 thin films fabricated using “green” solvents under ambient conditions

Baral, Pramod; Zhang, Xinwen; Garden, Kelsey; Chakraborty, Nilave; Shen, Lening; Cao, Zikun; Gong, Xiong; Whittaker-Brooks, Luisa; Wang, He

doi:10.1016/j.orgel.2023.106763

Efficient and stable perovskite solar cells based on blade-coated CH₃NH₃PbI₃ thin films fabricated using “green” solvents under ambient conditions

Journal Article · Thu Feb 02 23:00:00 EST 2023 · Organic Electronics

DOI:https://doi.org/10.1016/j.orgel.2023.106763· OSTI ID:2420924

Baral, Pramod ^[1]; Zhang, Xinwen ^[2]; Garden, Kelsey ^[3]; ^[3]; Shen, Lening ^[4]; Cao, Zikun ^[2]; ^[4]; Whittaker-Brooks, Luisa ^[3]; ^[2]

Univ. of Miami, FL (United States); OSTI
Univ. of Miami, FL (United States)
Univ. of Utah, Salt Lake City, UT (United States)
Univ. of Akron, OH (United States)

Metal halide perovskites are considered the most promising candidates for solar cells of the decade due to their exceptional optical and electronic properties. The power conversion efficiency of metal halide perovskites, when incorporated as the active layer of solar cells, has become comparable to that observed for conventional silicon solar cells. However, the stability, scaleup, green solvent usage, and fabrication in ambient conditions of metal halide perovskites need to be solved for commercial applications. Here, in this work, we report the fabrication of blade-coated methylammonium lead iodide (MAPbI₃) perovskite thin films using methylamine and acetonitrile as “green” solvents under ambient conditions. Our perovskite films are initially prepared from low purity PbI2 (99%) and are blade-coated in dry air at relative humidity (RH) levels above 30%. A significant advantage of fabricating our perovskite thin films via blade-coating protocols is that there is a minimal amount of precursors (5 μL) used compared to spin-coating methods (50μL–60μL) for a 4 cm² substrate. With the addition of a small amount of an organic halide salt, namely, phenethylammonium chloride, the film crystallinity is improved and non-radiative recombination is suppressed, resulting in power conversion efficiencies over 20%. In addition, the device maintains more than 95% of its initial efficiency after 500 h under continuous light illumination of 1-sun at open circuit conditions, 50 °C and 60% RH. The above method leads a path towards the commercial fabrication of perovskite solar cells.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Utah, Salt Lake City, UT (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

Grant/Contract Number:: SC0019041

OSTI ID:: 2420924

Alternate ID(s):: OSTI ID: 1924807

Journal Information:: Organic Electronics, Journal Name: Organic Electronics Vol. 116; ISSN 1566-1199

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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14 SOLAR ENERGY
Ambient condition
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Green solvent
Perovskite solar cells

Efficient and stable perovskite solar cells based on blade-coated CH3NH3PbI3 thin films fabricated using “green” solvents under ambient conditions

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Efficient and stable perovskite solar cells based on blade-coated CH₃NH₃PbI₃ thin films fabricated using “green” solvents under ambient conditions