Designing of novel efficient photoactive ternary Zn1-xCu2xSe thin film materials via hydrothermal route: Photoelectrochemical (PEC) cell study

Satish S. Patil; Sawanta S. Mali; Chang K. Hong; Popatrao N. Bhosale

doi:10.1016/j.mssp.2019.104727

Designing of novel efficient photoactive ternary Zn_1-xCu_2xSe thin film materials via hydrothermal route: Photoelectrochemical (PEC) cell study

Satish S. Patil, Sawanta S. Mali, Chang K. Hong, Popatrao N. Bhosale^*

^*Corresponding author for this work

Pure And Applied Chemistry

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

Herein, facile hydrothermal route was directly employed to synthesize photoactive copper doped zinc selenide (Zn_1-xCu_2xSe) thin films as function of copper ion concentration. The effect of Cu ion concentration on optical, morphological, structural, compositional and photoelectrochemical properties of Zn_1-xCu_2xSe thin films have been Investigated. Optical absorption elucidations revealed that, Zn_1-xCu_2xSe 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 Zn_1-xCu_2xSe thin film. X-ray photoelectron spectroscopy (XPS) analysis confirms the existence of Cu⁺, Zn²⁺ and Se²⁻ elements in deposited Zn_1-xCu_2xSe thin film. The detailed electron impedance spectroscopy (EIS) studies were carried out and it is well support to the photoelectrochemical (PEC) performance of Zn_1-xCu_2xSe photoanode. From J-V measurements, Cu rich film photoanode shows better PEC performance with best photoconversion efficiency (η) 1.65% for sample CZS₅.

Original language	English
Article number	104727
Number of pages	13
Journal	Materials Science in Semiconductor Processing
Volume	105
DOIs	https://doi.org/10.1016/j.mssp.2019.104727
Publication status	Published - Jan 2020

Funding

One of author Mr. Satish S. Patil is very much thankful to Department of Science and Technology (DST), New Delhi for providing DST-INSPIRE fellowship for financial support (Registration No. IF160712 ). This work is also supported by Basic science and research programme through the National Science Research Foundation of Korea (NRF) funded by Ministry of Education ( NRF=2009–0094055 ).

Keywords

HR-TEM
hydrothermal route
nanoflakes
photoconversion efficiency
ZnCuSe thin films

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10.1016/j.mssp.2019.104727

Cite this

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title = "Designing of novel efficient photoactive ternary Zn1-xCu2xSe thin film materials via hydrothermal route: Photoelectrochemical (PEC) cell study",

abstract = "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.",

keywords = "HR-TEM, hydrothermal route, nanoflakes, photoconversion efficiency, ZnCuSe thin films",

author = "Patil, {Satish S.} and Mali, {Sawanta S.} and Hong, {Chang K.} and Bhosale, {Popatrao N.}",

year = "2020",

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T2 - Photoelectrochemical (PEC) cell study

AU - Patil, Satish S.

AU - Mali, Sawanta S.

AU - Hong, Chang K.

AU - Bhosale, Popatrao N.

PY - 2020/1

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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

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