Journal
NANOTECHNOLOGY
Volume 26, Issue 34, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/0957-4484/26/34/342001
Keywords
perovskite solar cells; organic-inorganic lead halide perovskite; energy level alignment; charge dynamics; light emission; hysteresis; photophysics
Funding
- Nanyang Technological University [M4080514]
- SPMS collaborative Research [M4080536]
- Ministry of Education AcRF Tier 2 [MOE2013-T2-1-081, MOE2014-T2-1-044]
- Singapore National Research Foundation through the Singapore-Berkeley Research Initiative for Sustainable Energy (SinBeRISE) CREATE Program
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The rapid transcendence of organic-inorganic metal halide perovskite solar cells to above the 20% efficiency mark has captivated the broad photovoltaic community. As the efficiency race continues unabated, it is essential that fundamental studies keep pace with these developments. Further gains in device efficiencies are expected to be increasingly arduous and harder to come by. The key to driving the perovskite solar cell efficiencies towards their Shockley-Queisser limit is through a clear understanding of the interfacial energetics and dynamics between perovskites and other functional materials in nanostructured-and heterojunction-type devices. In this review, we focus on the current progress in basic characterization studies to elucidate the interfacial energetics (energy-level alignment and band bending) and dynamical processes (from the ultrafast to the ultraslow) in organic-inorganic metal halide perovskite photovoltaics and light emitters. Major findings from these studies will be distilled. Open questions and scientific challenges will also be highlighted.
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