Multispectral analysis of photosensitive perovskite-E7 liquid crystal composites: Correlating optical response with electrical properties
Küçük Resim Yok
Tarih
2025
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This study investigates the photoresponsive electrical and dielectric characteristics of CH3NH3PbI3-xClx perovskite precursor ink-doped nematic liquid crystal (E7) composite under variable illumination intensities (0-100 mW/cm2). Through comprehensive electrochemical impedance spectroscopy analysis, we observed significant light-dependent modulation of charge transport mechanisms. Electrochemical impedance spectroscopy measurements revealed a 27-fold enhancement in current density under 100 mW/cm2 illumination compared to dark conditions. Complex impedance analysis demonstrated systematic reduction in charge transfer resistance with increasing light intensity, while dielectric studies revealed distinct relaxation processes in low and highfrequency regions. The composite exhibited dual relaxation times (tau 1, tau 2) that decreased from 430 to 90 s at first relaxation region (tau 1), and reaching maximum values from 8x10-4 s to 2.5 x 10-3 s at second relaxation region (tau 2) significantly with increasing illumination. AC conductivity analysis revealed four distinct conduction regions with varying frequency dependencies, suggesting multiple charge transport mechanisms. These findings demonstrate the potential of perovskite-liquid crystal composites for optoelectronic applications requiring tunable electrical and dielectric properties.
Açıklama
Anahtar Kelimeler
Halide Perovskite, Liquid crystal, Photoresponsive behavior, Impedance spectroscopy, Dielectric relaxation, Charge transport mechanisms
Kaynak
Optical Materials
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
162
