Room-Temperature Processed Nb_2O_5 as the Electron Transporting Layer for Efficient Planar Perovskite Solar Cells
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- 英文论文题名：Room-Temperature Processed Nb_2O_5 as the Electron Transporting Layer for Efficient Planar Perovskite Solar Cells
- 论文作者：Xufeng Ling ; Jianyu Yuan ; Zhike Liu ; Wanli Ma
- 英文论文作者：Xufeng Ling ; Jianyu Yuan ; Zhike Liu ; Wanli Ma ; Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices ; Institute of Functional Nano & Soft Materials (FUNSOM) ; Soochow University ; Key Laboratory of Applied Surface and Colloid Chemistry ; National Ministry of Education ; Shaanxi Engineering Lab for Advanced Energy Technology ; School of Materials Science and Engineering ; Shaanxi Normal University
- 年：2017
- 作者机构：Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University;Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University;
- 英文论文关键词：Room-temperature ; Nb2O5 ; Electron transporting layer ; Perovskite solar cells
- 会议召开时间：2017-05-27
- 会议录名称：第四届新型太阳能电池学术研讨会论文集
- 英文会议录名称：Abstract Book of the 4th Conference on New Generation Solar Cells
- 语种：英文
- 分类号：TM914.4
- 学会代码：ZKYQ
- 会议名称：第四届新型太阳能电池学术研讨会
- 会议地点：中国北京
- 主办单位：中国可再生能源学会光化学专业委员会
- 学会名称：中国科学院物理研究所清洁能源实验室
- 页数：1
- 文件大小：492k
- 原文格式：D
- 会议级别：全国
摘要
We disclose the fabrication and characterization of high-efficiency planar perovskite solar cells(PSCs) using room-temperature sputtered niobium oxide(Nb_2O_5) as the electron transporting layer(ETL).The as sputtered amorphous Nb_2O_5 ETL(labeled as a-Nb_2O_5) without any heat treatment can lead to an excellent power conversion efficiency(PCE) of 17.1% for planar PSCs.Interestingly, the crystalline Nb_2O_5(labeled as c-Nb_2O_5) with high-temperature(500 ℃) annealing results in very similar PCE of 17.2%, indicating the great advantage of a-Nb_2O_5 in energy saving.The Hall Effect measurements indicate both high mobility and conductivity for the a-Nb_2O_5 film.Kelvin probe force microscopy(KPFM) measurements define the Fermi levels of a-Nb_2O_5 and c-Nb_2O_5 as-4.31 eV and-4.02 eV, respectively, which allow efficient electron extraction at the Nb_2O_5/perovskite interface regardless of the additional heat treatment on Nb_2O_5 film.The room-temperature processing and relatively high device performance of a-Nb_2O_5 suggest great potential for its application on flexible large-area solar cells and other optoelectrical devices.
We disclose the fabrication and characterization of high-efficiency planar perovskite solar cells(PSCs) using room-temperature sputtered niobium oxide(Nb_2O_5) as the electron transporting layer(ETL).The as sputtered amorphous Nb_2O_5 ETL(labeled as a-Nb_2O_5) without any heat treatment can lead to an excellent power conversion efficiency(PCE) of 17.1% for planar PSCs.Interestingly, the crystalline Nb_2O_5(labeled as c-Nb_2O_5) with high-temperature(500 ℃) annealing results in very similar PCE of 17.2%, indicating the great advantage of a-Nb_2O_5 in energy saving.The Hall Effect measurements indicate both high mobility and conductivity for the a-Nb_2O_5 film.Kelvin probe force microscopy(KPFM) measurements define the Fermi levels of a-Nb_2O_5 and c-Nb_2O_5 as-4.31 eV and-4.02 eV, respectively, which allow efficient electron extraction at the Nb_2O_5/perovskite interface regardless of the additional heat treatment on Nb_2O_5 film.The room-temperature processing and relatively high device performance of a-Nb_2O_5 suggest great potential for its application on flexible large-area solar cells and other optoelectrical devices.
We disclose the fabrication and characterization of high-efficiency planar perovskite solar cells(PSCs) using room-temperature sputtered niobium oxide(Nb_2O_5) as the electron transporting layer(ETL).The as sputtered amorphous Nb_2O_5 ETL(labeled as a-Nb_2O_5) without any heat treatment can lead to an excellent power conversion efficiency(PCE) of 17.1% for planar PSCs.Interestingly, the crystalline Nb_2O_5(labeled as c-Nb_2O_5) with high-temperature(500 ℃) annealing results in very similar PCE of 17.2%, indicating the great advantage of a-Nb_2O_5 in energy saving.The Hall Effect measurements indicate both high mobility and conductivity for the a-Nb_2O_5 film.Kelvin probe force microscopy(KPFM) measurements define the Fermi levels of a-Nb_2O_5 and c-Nb_2O_5 as-4.31 eV and-4.02 eV, respectively, which allow efficient electron extraction at the Nb_2O_5/perovskite interface regardless of the additional heat treatment on Nb_2O_5 film.The room-temperature processing and relatively high device performance of a-Nb_2O_5 suggest great potential for its application on flexible large-area solar cells and other optoelectrical devices.
引文
[1]Jeon,N.J.;Noh,J.H.;Kim,Y.C.;Yang,W.S.;Ryu,S.;Seok,S.I.,Solvent engineering for highperformance inorganic–organic hybrid perovskite solar cells.Nat.Mater.2014,13,897-903.