衬底温度对蒸汽辅助沉积法制备钙钛矿薄膜微观结构的影响

刘华秋; 朱大明; 刘星; 季庚午; 杨迎国; 文闻; 高兴宇

doi:10.11889/j.0253-3219.2016.hjs.39.060104

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衬底温度对蒸汽辅助沉积法制备钙钛矿薄膜微观结构的影响

同步辐射技术及应用 | 更新时间：2021-05-24

- 衬底温度对蒸汽辅助沉积法制备钙钛矿薄膜微观结构的影响
- Influences of substrate temperature on the structure of the perovskite films prepared using a vapor-assisted solution process
- 核技术 2016年39卷第6期文章编号：060104
- 作者机构：
  
  1.中国科学院上海应用物理研究所张江园区上海 201204
  2.中国科学院大学北京 100049
  3.中国科学院微观界面物理与探测重点实验室上海 201800
- 作者简介：
  
  [ "刘华秋,男,1992年出生,2013毕业于复旦大学,现为硕士研究生,主要从事钙钛矿薄膜的制备、表征以及性能测试研究", "LIU Huaqiu, male, born in 1992, graduated from Fudan University in 2013, master student, mainly engaged in the preparation of perovskite thin film characterization and performance testing" ]
  杨迎国,E-mail:yangyingguo@sinap.ac.cn YANG Yingguo,E-mail:yangyingguo@sinap.ac.cn
  高兴宇,E-mail:gaoxingyu@sinap.ac.cn GAO Xingyu,E-mail:gaoxingyu@sinap.ac.cn
- 基金信息：
  
  国家自然科学基金(11175239);国家自然科学基金(11405257);国家自然科学基金(U1332205);上海市科委项目(14DZ2261200);国家自然科学基金(11405253)
- DOI：10.11889/j.0253-3219.2016.hjs.39.060104
  中图分类号： TL99
- 收稿日期：2016-03-18，
  
  修回日期：2016-04-18，
  
  纸质出版日期：2016-06-10
- 稿件说明：
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刘华秋, 朱大明, 刘星, 等. 衬底温度对蒸汽辅助沉积法制备钙钛矿薄膜微观结构的影响[J]. 核技术, 2016,39(6):060104

Huaqiu LIU, Daming ZHU, Xing LIU, et al. Influences of substrate temperature on the structure of the perovskite films prepared using a vapor-assisted solution process[J]. Nuclear techniques, 2016, 39(6): 060104
刘华秋, 朱大明, 刘星, 等. 衬底温度对蒸汽辅助沉积法制备钙钛矿薄膜微观结构的影响[J]. 核技术, 2016,39(6):060104 DOI： 10.11889/j.0253-3219.2016.hjs.39.060104.

Huaqiu LIU, Daming ZHU, Xing LIU, et al. Influences of substrate temperature on the structure of the perovskite films prepared using a vapor-assisted solution process[J]. Nuclear techniques, 2016, 39(6): 060104 DOI： 10.11889/j.0253-3219.2016.hjs.39.060104.

摘要

通过调控薄膜生长衬底温度

提出了一种改良的蒸汽辅助沉积法制备有机-无机混合钙钛矿薄膜

可以更为可控优化薄膜生长条件。用同步辐射掠入射X射线衍射(Grazing Incidence X-ray Diffraction

GIXRD)结合扫描电镜(Scanning Electron Microscope

SEM)、紫外可见吸收谱(UV-Visible Absorption Spectrum)等表征方法证明衬底温度对制备的钙钛矿薄膜质量具有重要的作用:较低的衬底温度(约70℃)有助于钙钛矿晶粒的形成

其结晶性、晶面择优生长取向均较好

同时具有较高的光吸收性能;当衬底温度升高时(100℃、125℃)

所制备的钙钛矿薄膜结晶性变弱

晶体择优生长取向明显变差

光吸收性能随之下降。研究结果有助于进一步优化蒸汽辅助沉积法制备钙钛矿薄膜工艺。

Abstract

Background

The crystallinity and morphology of perovskite thin film have decisive roles on its device performance in the perovskite solar cells. The perovskite thin film can be prepared using a vapor-assisted solution process

which needs to be thoroughly investigated to improve its crystallinity and morphology.

Purpose

We attempt to study the influence of the substrate temperature on the crystallinity and morphology of perovskite thin film prepared using the vapor-assisted solution process.

Methods

The perovskite thin films were prepared using a modified vapor-assisted solution process with different substrate temperatures

which were characterized by grazing incidence X-ray diffraction (GIXRD)

UV-visible absorption spectrum

and scanning electron microscope (SEM).

Results

GIXRD analysis shows that the perovskite thin film prepared via the vapor-assisted solution process with a low substrate temperature of 70℃ exhibits favorite crystallinity with better preferential crystalline orientation than those prepared at higher temperatures (100℃ and 125℃). UV-Visible absorption spectra show the optical absorption intensity of perovskite thin film prepared with a low substrate temperature of 70℃ is the largest. SEM results support the GIXRD results

which show the perovskite crystal size and the film morphology change dramatically with increasing substrate temperature.

Conclusion

Based on the above results

the crystallinity

morphology and the optical absorption of perovskite thin film prepared using the modified vapor-assisted solution process are sensitive to the substrate temperature during the preparation. In general

a low substrate temperature in the modified vapor-assisted solution process is more desirable to prepare perovskite films with good crystallinity and high optical absorption.

关键词

Keywords

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