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This article is cited in 2 scientific papers (total in 2 papers)
Physical science of materials
Photoluminescence and photoconductivity of lead halide perovskite films modified with mixed cellulose esters
A. N. Aleshina, P. P. Shirinkina, A. K. Khripunovb, N. N. Saprykinab, I. P. Shcherbakova, I. N. Trapeznikovaa, P. A. Aleshina, V. N. Petrova a Ioffe Institute, Russian Academy of Sciences, St. Petersburg, Russia
b Institute of Macromolecular Compounds, Saint-Petersburg, Russia
Abstract:
We have investigated the photoluminescence (PL) and photoconductivity of lead halide perovskite (CH$_{3}$NH$_{3}$PbBr$_{3}$) films modified with different mixed cellulose esters (CEs). It was shown that the absorbance and PL spectra of CH$_{3}$NH$_{3}$PbBr$_{3}$ : CE films contain contributions of both the CH$_{3}$NH$_{3}$PbBr$_{3}$ and CE with the dominant contribution to the PL from perovskite component. The dependences of the integral PL intensities of the CH$_{3}$NH$_{3}$PbBr$_{3}$ : CE films on the optical excitation power turned out to be sublinear. This indicates that exciton recombination, as well as recombination via impurity levels, occur in CH$_{3}$NH$_{3}$PbBr$_{3}$ : CE films at high excitation power levels. The conductivity of CH$_{3}$NH$_{3}$PbBr$_{3}$ : CE films at 300 K increases up to $\sim$ 90 times when illuminated by a solar simulator, and this effect is environmentally stable due to the formation of hydrogen bonds between CE and the lead halide perovskite CH$_{3}$NH$_{3}$PbBr$_{3}$. It is expected that appropriate selection of CE and optimization of CE inclusion will improve the optoelectronic properties and stability of composite films based on lead halide perovskite-CE composites.
Keywords:
mixed cellulose esters, lead halide perovskites, photoluminescence, conductivity.
Received: 27.01.2021 Revised: 27.01.2021 Accepted: 27.01.2021
Citation:
A. N. Aleshin, P. P. Shirinkin, A. K. Khripunov, N. N. Saprykina, I. P. Shcherbakov, I. N. Trapeznikova, P. A. Aleshin, V. N. Petrov, “Photoluminescence and photoconductivity of lead halide perovskite films modified with mixed cellulose esters”, Zhurnal Tekhnicheskoi Fiziki, 91:6 (2021), 987; Tech. Phys., 66:7 (2021), 827–834
Linking options:
https://www.mathnet.ru/eng/jtf4995 https://www.mathnet.ru/eng/jtf/v91/i6/p987
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