TY - JOUR
T1 - Designing of novel efficient photoactive ternary Zn1-xCu2xSe thin film materials via hydrothermal route
T2 - Photoelectrochemical (PEC) cell study
AU - Patil, Satish S.
AU - Mali, Sawanta S.
AU - Hong, Chang K.
AU - Bhosale, Popatrao N.
PY - 2020/1
Y1 - 2020/1
N2 - Herein, facile hydrothermal route was directly employed to synthesize photoactive copper doped zinc selenide (Zn1-xCu2xSe) thin films as function of copper ion concentration. The effect of Cu ion concentration on optical, morphological, structural, compositional and photoelectrochemical properties of Zn1-xCu2xSe thin films have been Investigated. Optical absorption elucidations revealed that, Zn1-xCu2xSe thin films shows direct allowed type of electronic transition with decrease in band gap energy from 2.45 eV to 2.09 eV with varying in Cu ion concentration respectively. A structural study of films confirms the generation of cubic zinc blende crystal structure with crystallite size in the range of 82 nm–58 nm. Decrease in defect level of synthesized material was explored by photoluminescence spectra. Alteration in surface morphology was observed from nanosphere to well grown nanoflakes. High resolution transmission electron microscopy (HR-TEM) and selected area electron diffraction (SAED) study reveals that formation of nanocrystalline Zn1-xCu2xSe thin film. X-ray photoelectron spectroscopy (XPS) analysis confirms the existence of Cu+, Zn2+ and Se2− elements in deposited Zn1-xCu2xSe thin film. The detailed electron impedance spectroscopy (EIS) studies were carried out and it is well support to the photoelectrochemical (PEC) performance of Zn1-xCu2xSe photoanode. From J-V measurements, Cu rich film photoanode shows better PEC performance with best photoconversion efficiency (η) 1.65% for sample CZS5.
AB - Herein, facile hydrothermal route was directly employed to synthesize photoactive copper doped zinc selenide (Zn1-xCu2xSe) thin films as function of copper ion concentration. The effect of Cu ion concentration on optical, morphological, structural, compositional and photoelectrochemical properties of Zn1-xCu2xSe thin films have been Investigated. Optical absorption elucidations revealed that, Zn1-xCu2xSe thin films shows direct allowed type of electronic transition with decrease in band gap energy from 2.45 eV to 2.09 eV with varying in Cu ion concentration respectively. A structural study of films confirms the generation of cubic zinc blende crystal structure with crystallite size in the range of 82 nm–58 nm. Decrease in defect level of synthesized material was explored by photoluminescence spectra. Alteration in surface morphology was observed from nanosphere to well grown nanoflakes. High resolution transmission electron microscopy (HR-TEM) and selected area electron diffraction (SAED) study reveals that formation of nanocrystalline Zn1-xCu2xSe thin film. X-ray photoelectron spectroscopy (XPS) analysis confirms the existence of Cu+, Zn2+ and Se2− elements in deposited Zn1-xCu2xSe thin film. The detailed electron impedance spectroscopy (EIS) studies were carried out and it is well support to the photoelectrochemical (PEC) performance of Zn1-xCu2xSe photoanode. From J-V measurements, Cu rich film photoanode shows better PEC performance with best photoconversion efficiency (η) 1.65% for sample CZS5.
KW - HR-TEM
KW - hydrothermal route
KW - nanoflakes
KW - photoconversion efficiency
KW - ZnCuSe thin films
U2 - 10.1016/j.mssp.2019.104727
DO - 10.1016/j.mssp.2019.104727
M3 - Article
AN - SCOPUS:85072049200
SN - 1369-8001
VL - 105
JO - Materials Science in Semiconductor Processing
JF - Materials Science in Semiconductor Processing
M1 - 104727
ER -