Influence of air annealing temperature on physical properties of MgF2 -treated CdSe thin films: phase transition and grain growth

IF 1.3 4区材料科学 Q3 CRYSTALLOGRAPHY Phase Transitions Pub Date : 2022-12-21 DOI:10.1080/01411594.2022.2153048

Suman Kumari, G. Chasta, Himanshu, N. Kumari, M. Dhaka

引用次数: 2

Abstract

ABSTRACT In the present study, as a replacement for venomous CdCl2 compound, MgF2 activation is undertaken to explore the impact of ionic radii of halide on grain growth and physical properties of physical vapor-deposited CdSe films for absorber layer roles to solar cells. The MgF2 activation is performed at 200°C, 300°C and 400°C. The XRD analysis shows that as-deposited CdSe films are polycrystalline in nature having mixed phases of cubic and hexagonal and phase transformation from (111)C to (103)H is observed for treated films. The energy band gap is varied in the 1.65–1.71 eV range and a stronger NBE PL peak is observed at ∼675 nm. The AFM analysis reveals hillock like topography, where hills height and distribution are varied with activation. The CdSe films activated by MgF2 at 200°C could become potential absorber layers to solar cells due to their higher roughness, grain growth, absorbance and appropriate electrical properties.

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空气退火温度对MgF2处理的CdSe薄膜物理性能的影响:相变和晶粒生长

摘要:本研究采用MgF2活化作为有毒CdCl2化合物的替代品，探索卤化物离子半径对物理气相沉积CdSe薄膜的晶粒生长和物理性能的影响，以作为太阳能电池吸收层。MgF2在200°C、300°C和400°C下活化。XRD分析表明，沉积的CdSe薄膜本质上是多晶的，具有立方相和六方相的混合相，处理后的薄膜从(111)C转变为(103)H。能带隙在1.65 ~ 1.71 eV范围内变化，在~ 675 nm处观察到更强的NBE PL峰。原子力显微镜分析显示小山状地形，小山的高度和分布随活化而变化。MgF2在200°C下活化的CdSe薄膜具有较高的粗糙度、晶粒生长、吸光度和合适的电学性能，可以成为太阳能电池的潜在吸收层。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Phase Transitions 物理-晶体学

CiteScore

3.00

自引率

6.20%

发文量

审稿时长

1.4 months

期刊介绍： Phase Transitions is the only journal devoted exclusively to this important subject. It provides a focus for papers on most aspects of phase transitions in condensed matter. Although emphasis is placed primarily on experimental work, theoretical papers are welcome if they have some bearing on experimental results. The areas of interest include: -structural phase transitions (ferroelectric, ferroelastic, multiferroic, order-disorder, Jahn-Teller, etc.) under a range of external parameters (temperature, pressure, strain, electric/magnetic fields, etc.) -geophysical phase transitions -metal-insulator phase transitions -superconducting and superfluid transitions -magnetic phase transitions -critical phenomena and physical properties at phase transitions -liquid crystals -technological applications of phase transitions -quantum phase transitions Phase Transitions publishes both research papers and invited articles devoted to special topics. Major review papers are particularly welcome. A further emphasis of the journal is the publication of a selected number of small workshops, which are at the forefront of their field.