CsPbBr<sub>3</sub> Solar Cells [electronic resource] : Controlled Film Growth through Layer-by-Layer Quantum Dot Deposition
- Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2017.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- pages 9,767-9,774 : digital, PDF file
- Additional Creators:
- United States. Department of Energy. Office of Basic Energy Sciences
United States. Department of Energy. Office of Scientific and Technical Information
- All inorganic cesium lead bromide (CsPbBr<sub>3</sub>) perovskite is a more stable alternative to methylammonium lead bromide (MAPbBr<sub>3</sub>) for designing high open-circuit voltage solar cells and display devices. Poor solubility of CsBr in organic solvents makes typical solution deposition methods difficult to adapt for constructing CsPbBr<sub>3</sub> devices. Our layer-by-layer methodology, which makes use of CsPbBr<sub>3</sub> quantum dot (QD) deposition followed by annealing, provides a convenient way to cast stable films of desired thickness. The transformation from QDs into bulk during thermal annealing arises from the resumption of nanoparticle growth and not from sintering as generally assumed. Additionally, a large loss of organic material during the annealing process is mainly from 1-octadecene left during the QD synthesis. Utilizing this deposition approach for perovskite photovoltaics is examined using typical planar architecture devices. Devices optimized to both QD spin-casting concentration and overall CsPbBr<sub>3</sub> thickness produce champion devices that reach power conversion efficiencies of 5.5% with a V<sub>oc</sub> value of 1.4 V. Finally, the layered QD deposition demonstrates a controlled perovskite film architecture for developing efficient, high open-circuit photovoltaic devices.
- Published through SciTech Connect.
Chemistry of Materials 29 22 ISSN 0897-4756 AM
Jacob B. Hoffman; Gary Zaiats; Isaac Wappes; Prashant V. Kamat.
Univ. of Notre Dame, IN (United States). Radiation Laboratory
- Funding Information:
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