Defective TiO2 with high photoconductive gain for efficient and stable planar heterojunction perovskite solar cells

Yanbo Li, Jason K. Cooper, Wenjun Liu, Carolin M. Sutter-Fella, Matin Amani, Jeffrey W. Beeman, Ali Javey, Joel W. Ager, Yi Liu, Francesca M. Toma () and Ian D. Sharp ()
Additional contact information
Yanbo Li: Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory
Jason K. Cooper: Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory
Wenjun Liu: Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory
Carolin M. Sutter-Fella: Lawrence Berkeley National Laboratory
Matin Amani: Lawrence Berkeley National Laboratory
Jeffrey W. Beeman: Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory
Ali Javey: Electrical Engineering and Computer Sciences, University of California
Joel W. Ager: Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory
Yi Liu: Lawrence Berkeley National Laboratory
Francesca M. Toma: Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory
Ian D. Sharp: Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory

Nature Communications, 2016, vol. 7, issue 1, 1-7

Abstract: 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 TiO2 thin film as the electron transport layer. TiO2 layers with native defects are deposited by electron beam evaporation in an oxygen-deficient environment. Deep-level hole traps are introduced in the TiO2 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 TiO2 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.

Date: 2016
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/ncomms12446 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms12446

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/ncomms12446

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().