Defective TiO2 with high photoconductive gain for efficient and stable planar heterojunction perovskite solar cells
Abstract
Formation of planar heterojunction perovskite solar cells exhibiting both high efficiency and stability under continuous operation remains a challenge. Here, we show this can be achieved by using a defective TiO 2 thin film as the electron transport layer. TiO 2 layers with native defects are deposited by electron beam evaporation in an oxygen-deficient environment. Deep-level hole traps are introduced in the TiO 2 layers and contribute to a high photoconductive gain and reduced photocatalytic activity. The high photoconductivity of the TiO2 electron transport layer leads to improved efficiency for the fabricated planar devices. A maximum power conversion efficiency of 19.0% and an average PCE of 17.5% are achieved. In addition, the reduced photocatalytic activity of the TiO 2 layer leads to enhanced long-Term stability for the planar devices. Under continuous operation near the maximum power point, an efficiency of over 15.4% is demonstrated for 100 h.
- Authors:
-
[1];
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint Center for Artificial Photosynthesis, Chemical Sciences Division
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Univ. of California, Berkeley, CA (United States). Electrical Engineering and Computer Sciences
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint Center for Artificial Photosynthesis, Materials Sciences Division
- Univ. of California, Berkeley, CA (United States). Electrical Engineering and Computer Sciences
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint Center for Artificial Photosynthesis; Univ. of California, Berkeley, CA (United States). Materials Science and Engineering
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division, Molecular Foundry
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1379568
- Grant/Contract Number:
- AC02-05CH11231; SC0004993
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 7; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; 36 MATERIALS SCIENCE; Electronic devices; Solar cells
Citation Formats
Li, Yanbo, Cooper, Jason K., Liu, Wenjun, Sutter-Fella, Carolin M., Amani, Matin, Beeman, Jeffrey W., Javey, Ali, Ager, Joel W., Liu, Yi, Toma, Francesca M., and Sharp, Ian D. Defective TiO2 with high photoconductive gain for efficient and stable planar heterojunction perovskite solar cells. United States: N. p., 2016.
Web. doi:10.1038/ncomms12446.
Li, Yanbo, Cooper, Jason K., Liu, Wenjun, Sutter-Fella, Carolin M., Amani, Matin, Beeman, Jeffrey W., Javey, Ali, Ager, Joel W., Liu, Yi, Toma, Francesca M., & Sharp, Ian D. Defective TiO2 with high photoconductive gain for efficient and stable planar heterojunction perovskite solar cells. United States. https://doi.org/10.1038/ncomms12446
Li, Yanbo, Cooper, Jason K., Liu, Wenjun, Sutter-Fella, Carolin M., Amani, Matin, Beeman, Jeffrey W., Javey, Ali, Ager, Joel W., Liu, Yi, Toma, Francesca M., and Sharp, Ian D. Thu .
"Defective TiO2 with high photoconductive gain for efficient and stable planar heterojunction perovskite solar cells". United States. https://doi.org/10.1038/ncomms12446. https://www.osti.gov/servlets/purl/1379568.
@article{osti_1379568,
title = {Defective TiO2 with high photoconductive gain for efficient and stable planar heterojunction perovskite solar cells},
author = {Li, Yanbo and Cooper, Jason K. and Liu, Wenjun and Sutter-Fella, Carolin M. and Amani, Matin and Beeman, Jeffrey W. and Javey, Ali and Ager, Joel W. and Liu, Yi and Toma, Francesca M. and Sharp, Ian D.},
abstractNote = {Formation of planar heterojunction perovskite solar cells exhibiting both high efficiency and stability under continuous operation remains a challenge. Here, we show this can be achieved by using a defective TiO 2 thin film as the electron transport layer. TiO 2 layers with native defects are deposited by electron beam evaporation in an oxygen-deficient environment. Deep-level hole traps are introduced in the TiO 2 layers and contribute to a high photoconductive gain and reduced photocatalytic activity. The high photoconductivity of the TiO2 electron transport layer leads to improved efficiency for the fabricated planar devices. A maximum power conversion efficiency of 19.0% and an average PCE of 17.5% are achieved. In addition, the reduced photocatalytic activity of the TiO 2 layer leads to enhanced long-Term stability for the planar devices. Under continuous operation near the maximum power point, an efficiency of over 15.4% is demonstrated for 100 h.},
doi = {10.1038/ncomms12446},
journal = {Nature Communications},
number = ,
volume = 7,
place = {United States},
year = {Thu Aug 18 00:00:00 EDT 2016},
month = {Thu Aug 18 00:00:00 EDT 2016}
}
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