Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Robust Free Excitons in CH3NH3PbI3 Halide Perovskite Revealed by Four-Wave Mixing. / Назаров, Роман Сергеевич; Соловьев, Иван Александрович; Мурзин, Алексей Олегович; Селиванов, Никита Иванович; Гетс, Дмитрий; Макаров, Сергей; Стомпос, Константинос; Капитонов, Юрий Владимирович.
в: Advanced Optical Materials, Том 12, № 15, 2303049, 28.05.2024.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Robust Free Excitons in CH3NH3PbI3 Halide Perovskite Revealed by Four-Wave Mixing
AU - Назаров, Роман Сергеевич
AU - Соловьев, Иван Александрович
AU - Мурзин, Алексей Олегович
AU - Селиванов, Никита Иванович
AU - Гетс, Дмитрий
AU - Макаров, Сергей
AU - Стомпос, Константинос
AU - Капитонов, Юрий Владимирович
PY - 2024/5/28
Y1 - 2024/5/28
N2 - Direct bandgap semiconductors possess a unique attribute: the presence of a free exciton state with a high total oscillator strength. This property makes them highly promising for applications in ultrafast optical signal processing and optical computing. One such protocol for optical computing is based on four-wave mixing (FWM). In this study, the nonlinear optical effect in polycrystalline thin films of halide perovskite MAPbI3 (MA+ = CH3NH (Formula presented.)) at low temperatures is demonstrated. Through analyzing the spectroscopy of the FWM signal, studying the photoluminescence excitation spectra, and comparing the findings with results from MAPbI3 single crystals, it has been discovered that the strongest nonlinear response is observed at the free exciton resonance and in the region of shallow defect states. Surprisingly, the presence of FWM in cross-linear excitation geometry has been observed, indicating potential involvement of other nonlinear or many-body effects. The observations of FWM with free excitons even in highly defective MAPbI3 thin films demonstrate the robustness of the exciton resonance and highlight the practical prospects for utilizing this material in optical computing.
AB - Direct bandgap semiconductors possess a unique attribute: the presence of a free exciton state with a high total oscillator strength. This property makes them highly promising for applications in ultrafast optical signal processing and optical computing. One such protocol for optical computing is based on four-wave mixing (FWM). In this study, the nonlinear optical effect in polycrystalline thin films of halide perovskite MAPbI3 (MA+ = CH3NH (Formula presented.)) at low temperatures is demonstrated. Through analyzing the spectroscopy of the FWM signal, studying the photoluminescence excitation spectra, and comparing the findings with results from MAPbI3 single crystals, it has been discovered that the strongest nonlinear response is observed at the free exciton resonance and in the region of shallow defect states. Surprisingly, the presence of FWM in cross-linear excitation geometry has been observed, indicating potential involvement of other nonlinear or many-body effects. The observations of FWM with free excitons even in highly defective MAPbI3 thin films demonstrate the robustness of the exciton resonance and highlight the practical prospects for utilizing this material in optical computing.
KW - PLE spectroscopy
KW - exciton
KW - four-wave mixing
KW - halide perovskites
KW - photoluminescence excitation
UR - https://www.mendeley.com/catalogue/bad91b49-63e4-381c-9283-b2dd2bf0e0dd/
U2 - 10.1002/adom.202303049
DO - 10.1002/adom.202303049
M3 - Article
VL - 12
JO - Advanced Optical Materials
JF - Advanced Optical Materials
SN - 2195-1071
IS - 15
M1 - 2303049
ER -
ID: 119205376