TY - JOUR

T1 - Enhancing the CsPbBr3 PeLEC properties via PDMS/PMHS double-layer polymer encapsulation and high relative humidity stress-aging

AU - Baeva, Maria

AU - Мирошниченко, Анна Сергеевна

AU - Kenesbay, Ramazan

AU - Mitin, Dmitry M.

AU - Fedorov, Vladimir V.

AU - Gets, Dmitry S.

AU - Krasnikov, Dmitry

AU - Nasibulin, Alber G.

AU - Makarov, Sergey

AU - Мухин, Иван Сергеевич

AU - Исламова, Регина Маратовна

PY - 2023/10/11

Y1 - 2023/10/11

N2 - The trade-off between high luminance and moisture robustness of inorganic metal halide perovskite light-emitting electrochemical cells (PeLECs) is necessary for their use under harsh environmental conditions. Herein we report a new approach to improve the properties of a poly(ethylene oxide) (PEO)-CsPbBr3 perovskite device with a transparent single-walled carbon nanotube electrode consisting of two-layered cell encapsulation and 50 or 80% relative humidity stress-aging. The encapsulation into metal catalyst-free cross-linked polymethylhydrosiloxane (PMHS) does not impose a negative influence on the perovskite material's optoelectronic properties. Furthermore, the PeLECs are coated with a polydimethylsiloxane Sylgard 184 (PDMS) capping layer to provide mechanical strength. After 168 hours of accelerated aging at 80% relative humidity, the double-layer (PMHS/PDMS) encapsulated PeLEC indicates a luminance of >2000 cd m−2 at 4 V demonstrating the highest current efficiency and photoluminescence quantum yield among all samples (including non-aged and non-encapsulated ones) while the luminescent properties of a double-encapsulated PeLEC degrade significantly in a nitrogen atmosphere and at 50% relative humidity. Thereby, we show the optimal encapsulation recipe for a high-humidity environment that allows not only the use of PeLECs under extremely high relative humidity conditions but also improves their performance due to water diffusion. X-Ray diffraction data reveal that pronounced 〈hh0〉 and 〈00l〉 texture appears in single and doubled encapsulated thin films after 80% water vapor treatment. In contrast, the reference (non-encapsulated) perovskite film does not show complete texture formation, demonstrating possible grain coarsening and crystal quality deterioration after 80% water vapor treatment. The proposed approach combining PMHS/PDMS encapsulation and aging reveals a new promising strategy to develop efficient perovskite devices operating at high humidity, which also can be made flexible or even stretchable.

AB - The trade-off between high luminance and moisture robustness of inorganic metal halide perovskite light-emitting electrochemical cells (PeLECs) is necessary for their use under harsh environmental conditions. Herein we report a new approach to improve the properties of a poly(ethylene oxide) (PEO)-CsPbBr3 perovskite device with a transparent single-walled carbon nanotube electrode consisting of two-layered cell encapsulation and 50 or 80% relative humidity stress-aging. The encapsulation into metal catalyst-free cross-linked polymethylhydrosiloxane (PMHS) does not impose a negative influence on the perovskite material's optoelectronic properties. Furthermore, the PeLECs are coated with a polydimethylsiloxane Sylgard 184 (PDMS) capping layer to provide mechanical strength. After 168 hours of accelerated aging at 80% relative humidity, the double-layer (PMHS/PDMS) encapsulated PeLEC indicates a luminance of >2000 cd m−2 at 4 V demonstrating the highest current efficiency and photoluminescence quantum yield among all samples (including non-aged and non-encapsulated ones) while the luminescent properties of a double-encapsulated PeLEC degrade significantly in a nitrogen atmosphere and at 50% relative humidity. Thereby, we show the optimal encapsulation recipe for a high-humidity environment that allows not only the use of PeLECs under extremely high relative humidity conditions but also improves their performance due to water diffusion. X-Ray diffraction data reveal that pronounced 〈hh0〉 and 〈00l〉 texture appears in single and doubled encapsulated thin films after 80% water vapor treatment. In contrast, the reference (non-encapsulated) perovskite film does not show complete texture formation, demonstrating possible grain coarsening and crystal quality deterioration after 80% water vapor treatment. The proposed approach combining PMHS/PDMS encapsulation and aging reveals a new promising strategy to develop efficient perovskite devices operating at high humidity, which also can be made flexible or even stretchable.

UR - https://www.mendeley.com/catalogue/01c70b11-f60d-3344-a241-6d446141728b/

U2 - 10.1039/d3tc01370g

DO - 10.1039/d3tc01370g

M3 - Article

JO - Journal of Materials Chemistry C

JF - Journal of Materials Chemistry C

SN - 2050-7526

ER -