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

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms12446· OSTI ID:1379568
ORCiD logo [1];  [1];  [1];  [2];  [2];  [3];  [4];  [5];  [6];  [1];  [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint Center for Artificial Photosynthesis, Chemical Sciences Division
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Univ. of California, Berkeley, CA (United States). Electrical Engineering and Computer Sciences
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint Center for Artificial Photosynthesis, Materials Sciences Division
  4. Univ. of California, Berkeley, CA (United States). Electrical Engineering and Computer Sciences
  5. 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
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division, Molecular Foundry
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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.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; SC0004993
OSTI ID:
1379568
Journal Information:
Nature Communications, Vol. 7; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 107 works
Citation information provided by
Web of Science

References (25)

Long-Range Balanced Electron- and Hole-Transport Lengths in Organic-Inorganic CH3NH3PbI3 journal October 2013
Solvent engineering for high-performance inorganic–organic hybrid perovskite solar cells journal July 2014
Hysteresis and transient behavior in current–voltage measurements of hybrid-perovskite absorber solar cells journal January 2014
Organohalide lead perovskites for photovoltaic applications journal January 2014
Effects of Surface Blocking Layer of Sb 2 S 3 on Nanocrystalline TiO 2 for CH 3 NH 3 PbI 3 Perovskite Solar Cells journal May 2014
Planar heterojunction organometal halide perovskite solar cells: roles of interfacial layers journal January 2016
Reduced ultraviolet light induced degradation and enhanced light harvesting using YVO 4 :Eu 3+ down-shifting nano-phosphor layer in organometal halide perovskite solar cells journal July 2014
The emergence of perovskite solar cells journal July 2014
Trap-State Distributions and Carrier Transport in Pure and Mixed-Phase TiO 2 : Influence of Contacting Solvent and Interphasial Electron Transfer journal August 2008
Sequential deposition as a route to high-performance perovskite-sensitized solar cells journal July 2013
Understanding the Impact of Bromide on the Photovoltaic Performance of CH 3 NH 3 PbI 3 Solar Cells journal October 2015
Under the spotlight: The organic–inorganic hybrid halide perovskite for optoelectronic applications journal June 2015
Compositional engineering of perovskite materials for high-performance solar cells journal January 2015
Correlation of energy disorder and open-circuit voltage in hybrid perovskite solar cells journal January 2016
Photoconductivities in anatase TiO 2 nanorods journal October 2014
High Photoluminescence Quantum Yield in Band Gap Tunable Bromide Containing Mixed Halide Perovskites journal December 2015
Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells journal May 2009
Interface engineering of highly efficient perovskite solar cells journal July 2014
C 60 as an Efficient n-Type Compact Layer in Perovskite Solar Cells journal June 2015
Fabrication of Planar Heterojunction Perovskite Solar Cells by Controlled Low-Pressure Vapor Annealing journal January 2015
Overcoming ultraviolet light instability of sensitized TiO2 with meso-superstructured organometal tri-halide perovskite solar cells journal December 2013
The light and shade of perovskite solar cells journal August 2014
High-performance photovoltaic perovskite layers fabricated through intramolecular exchange journal May 2015
Stability of Metal Halide Perovskite Solar Cells journal September 2015
Correlation of energy disorder and open-circuit voltage in hybrid perovskite solar cells text January 2016

Cited By (27)

Perovskite Solar Cells with ZnO Electron-Transporting Materials journal November 2017
Effective Carrier-Concentration Tuning of SnO 2 Quantum Dot Electron-Selective Layers for High-Performance Planar Perovskite Solar Cells journal February 2018
Efficient Perovskite Solar Cells Fabricated Through CsCl-Enhanced PbI 2 Precursor via Sequential Deposition journal August 2018
Graphdiyne Quantum Dots for Much Improved Stability and Efficiency of Perovskite Solar Cells journal November 2017
Defect Engineering toward Highly Efficient and Stable Perovskite Solar Cells journal July 2018
Long-Lasting Nanophosphors Applied to UV-Resistant and Energy Storage Perovskite Solar Cells journal July 2017
Efficient and Hysteresis-Free Perovskite Solar Cells Based on a Solution Processable Polar Fullerene Electron Transport Layer journal August 2017
Spontaneous Interface Ion Exchange: Passivating Surface Defects of Perovskite Solar Cells with Enhanced Photovoltage journal August 2019
Synergistic Hematite-Fullerene Electron-Extracting Layers for Improved Efficiency and Stability in Perovskite Solar Cells journal January 2018
Suppressing Charge Recombination and Ultraviolet Light Degradation of Perovskite Solar Cells Using Silicon Oxide Passivation journal May 2019
Co‐Electrodeposition of Sn‐Doped TiO 2 Electron‐Transporting Layer for Perovskite Solar Cells journal November 2019
Scanning Probe Microscopy Applied to Organic-Inorganic Halide Perovskite Materials and Solar Cells journal December 2017
All-Inorganic Halide Perovskites for Optoelectronics: Progress and Prospects journal August 2017
Ferrites Obtained by Sol-Gel Method book June 2018
Low-Temperature Soft-Cover-Assisted Hydrolysis Deposition of Large-Scale TiO2 Layer for Efficient Perovskite Solar Modules journal April 2018
Two-dimensional organic-inorganic hybrid perovskite: from material properties to device applications journal July 2018
Dense Ge nanocrystals embedded in TiO2 with exponentially increased photoconduction by field effect journal March 2018
Solution-processed indium oxide electron transporting layers for high-performance and photo-stable perovskite and organic solar cells journal January 2017
ITIC surface modification to achieve synergistic electron transport layer enhancement for planar-type perovskite solar cells with efficiency exceeding 20% journal January 2017
A ternary organic electron transport layer for efficient and photostable perovskite solar cells under full spectrum illumination journal January 2018
Pathways toward high-performance inorganic perovskite solar cells: challenges and strategies journal January 2019
Prospects of e-beam evaporated molybdenum oxide as a hole transport layer for perovskite solar cells journal September 2017
A facile and controllable electrochemically fabricated nonstoichiometric MoO x film for novel opto-electronic devices journal May 2019
Understanding macroscale functionality of metal halide perovskites in terms of nanoscale heterogeneities journal December 2018
Synergistic Hematite-Fullerene Electron-Extracting Layers for Improved Efficiency and Stability in Perovskite Solar Cells journal February 2018
Self-Organized Fullerene Interfacial Layer for Efficient and Low-Temperature Processed Planar Perovskite Solar Cells with High UV-Light Stability journal April 2017
Recent Advance in Solution-Processed Organic Interlayers for High-Performance Planar Perovskite Solar Cells journal May 2018

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