Materials interface engineering for solution-processed photovoltaics

Michael Graetzel, René A. J. Janssen, David B. Mitzi and Edward H. Sargent ()
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Michael Graetzel: Institute of Photonics and Interfaces, Swiss Federal Institute of Technology
René A. J. Janssen: Molecular Materials and Nanosystems, Eindhoven University of Technology
David B. Mitzi: IBM TJ Watson Research Center, Yorktown Heights
Edward H. Sargent: University of Toronto

Nature, 2012, vol. 488, issue 7411, 304-312

Abstract: Abstract Advances in solar photovoltaics are urgently needed to increase the performance and reduce the cost of harvesting solar power. Solution-processed photovoltaics are cost-effective to manufacture and offer the potential for physical flexibility. Rapid progress in their development has increased their solar-power conversion efficiencies. The nanometre (electron) and micrometre (photon) scale interfaces between the crystalline domains that make up solution-processed solar cells are crucial for efficient charge transport. These interfaces include large surface area junctions between photoelectron donors and acceptors, the intralayer grain boundaries within the absorber, and the interfaces between photoactive layers and the top and bottom contacts. Controlling the collection and minimizing the trapping of charge carriers at these boundaries is crucial to efficiency.

Date: 2012
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DOI: 10.1038/nature11476

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