Aromatic nonpolar organogels for efficient and stable perovskite green emitters

Jae-Man Park, Jinwoo Park, Young-Hoon Kim, Huanyu Zhou, Younghoon Lee, Seung Hyeon Jo, Jinwoo Ma, Tae-Woo Lee and Jeong-Yun Sun ()
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Jae-Man Park: Seoul National University
Jinwoo Park: Seoul National University
Young-Hoon Kim: Seoul National University
Huanyu Zhou: Seoul National University
Younghoon Lee: Seoul National University
Seung Hyeon Jo: Seoul National University
Jinwoo Ma: Seoul National University
Tae-Woo Lee: Seoul National University
Jeong-Yun Sun: Seoul National University

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract Existing gels are mostly polar, whose nature limits their role in soft devices. The intermolecular interactions of nonpolar polymer-liquid system are typically weak, which makes the gel brittle. Here we report highly soft and transparent nonpolar organogels. Even though their elements are only carbon and hydrogen, their elastic modulus, transparency, and stretchability are comparable to common soft hydrogels. A key strategy is introducing aromatic interaction into the polymer-solvent system, resulting in a high swelling ratio that enables efficient plasticization of the polymer networks. As a proof of applicability, soft perovskite nanocomposites are synthesized, where the nonpolar environment of organogels enables stable formation and preservation of highly concentrated perovskite nanocrystals, showing high photoluminescence efficiency (~99.8%) after water-exposure and environmental stabilities against air, water, acid, base, heat, light, and mechanical deformation. Their superb properties enable the demonstration of soft electroluminescent devices that stably emit bright and pure green light under diverse deformations.

Date: 2020
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DOI: 10.1038/s41467-020-18383-y

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