Enhancing and Extinguishing the Different Emission Features of 2D (EA(1-)(x)FA(x))(4)Pb3Br10 Perovskite Films

Kennard, Rhiannon M; Dahlman, Clayton J; Morgan, Emily E.; Chung, Juil; Cotts, Benjamin L.; Kincaid, Joseph R. A.; DeCrescent, Ryan A; Stone, Kevin H.; Panuganti, Sobhana; Mohtashami, Yahya; Mao, Lingling; Schaller, Richard D.; Chabinyc, Michael L

doi:10.1002/adom.202200547

Enhancing and Extinguishing the Different Emission Features of 2D (EA(1-)(x)FA(x))(4)Pb3Br10 Perovskite Films

Journal Article · 01 September 2022 · Advanced Optical Materials

DOI:https://doi.org/10.1002/adom.202200547· OSTI ID:1923089

Kennard, Rhiannon M; Dahlman, Clayton J; Morgan, Emily E.; Chung, Juil; Cotts, Benjamin L.; Kincaid, Joseph R. A.; DeCrescent, Ryan A; Stone, Kevin H.; Panuganti, Sobhana; Mohtashami, Yahya; Mao, Lingling; Schaller, Richard D.; Chabinyc, Michael L

2D hybrid perovskites are attractive for optoelectronic devices. In thin films, the color of optical emission and the texture of crystalline domains are often difficult to control. Here, a method for extinguishing or enhancing different emission features is demonstrated for the family of 2D Ruddlesden-Popper perovskites (EA(1-)(x)FA(x))(4)Pb3Br10 (EA = ethylammonium, FA = formamidinium). When grown from aqueous hydrobromic acid, crystals of (EA(1-)(x)FA(x))(4)Pb3Br10 retain all the emission features of their parent compound, (EA)(4)Pb3Br10. Surprisingly, when grown from dimethylformamide (DMF), an emission feature, likely self-trapped exciton (STE), near 2.7 eV is missing. Extinction of this feature is correlated with DMF being incorporated between the 2D Pb-Br sheets, forming (EA(1-)(x)FA(x))(4)Pb3Br10 center dot(DMF)(y). Without FA, films grown from DMF form (EA)(4)Pb3Br10, retain little solvent, and have strong emission near 2.7 eV. Slowing the kinetics of film growth strengthens a different emission feature, likely a different type of STE, which is much broader and present in all compositions. Films of (EA(1-)(x)FA(x))(4)Pb3Br10 center dot(DMF)(y) have large, micron-sized domains and homogeneous orientation of the semiconducting sheets, resulting in low electronic disorder near the absorption edge. The ability to selectively strengthen or extinguish different emission features in films of (EA(1-)(x)FA(x))(4)Pb3Br10 center dot(DMF)(y) reveals a pathway to tune the emission color in these compounds.

Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE U.S. Department of Energy; National Science Foundation (NSF)

DOE Contract Number:: AC02-06CH11357

OSTI ID:: 1923089

Journal Information:: Advanced Optical Materials, Vol. 10, Issue 17

Country of Publication:: United States

Language:: English

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