NiO as Hole Transporting Layer for Inverted Perovskite Solar Cells: A Study of X‐Ray Photoelectron Spectroscopy

Author:

Nandi Pronoy12,Park Hyoungmin12,Shin Sooun12,Lee Jin‐Wook23,Kim Jin Young4,Ko Min Jae5,Jung Hyun Suk26,Park Nam‐Gyu27,Shin Hyunjung12ORCID

Affiliation:

1. Department of Energy Science Sungkyunkwan University Suwon 16419 South Korea

2. SKKU Institute of Energy Science and Technology (SIEST) Sungkyunkwan University Suwon 16419 South Korea

3. SKKU Advanced Institute of Nanotechnology (SAINT) and Department of Nanoengineering Sungkyunkwan University Suwon 16419 South Korea

4. Department of Materials Science and Engineering Seoul National University Seoul 08826 South Korea

5. Department of Chemical Engineering Hanyang University Seoul 04763 South Korea

6. School of Advanced Materials Science and Engineering Sungkyunkwan University Suwon 16419 South Korea

7. School of Chemical Engineering and Centre for Antibonding Regulated Crystals Sungkyunkwan University Suwon 16419 South Korea

Abstract

AbstractHygroscopic and acidic nature of organic hole transport layers (HTLs) insisted to replace it with metal oxide semiconductors due to their favorable charge carrier transport with long chemical stability. Apart from large direct bandgap and high optical transmittance, ionization energy in the range of −5.0 to −5.4 eV leads to use NiO as HTL due to good energetic matching with lead halide perovskites. Analyzing X‐ray photoelectron spectroscopic (XPS) data of NiO, it is speculated that p‐type conductivity is related to the NiOOH or Ni2O3 states in the structure and the electrical conductivity can be modified by altering the concentration of nickel or oxygen vacancies. However, it is difficult to separate the contribution from nonlocal screening, surface effect and the presence of vacancy induced Ni3+ ion due to very strong satellite structure in the Ni 2p XPS spectrum of NiO. Thus, an effective approach to analyze the NiO XPS spectrum is presented and the way to correlate the presence of Ni3+ with the conductivity results which will help to avoid overestimation in finding the oxygen‐rich/deficient conditions in NiO.

Funder

National Research Foundation of Korea

Kementerian Pendidikan

Publisher

Wiley

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3