APPLICATIONS OF TECHNOLOGY:
- Optoelectronics including photovoltaics, LED, photodetectors, lasers, etc.
- Tunable, uniform nanoscale light sources
- Can be fabricated in solution at near-ambient conditions
- Fast photoresponse rate, low defect density
Researchers at Berkeley Lab led by Peidong Yang have developed halide perovskite nanostructures, including inorganic lead halide perovskites, using a low temperature, solution phase growth technology that yields tunable, uniform single-crystal nanowires and nanosheets with superior optoelectronic qualities compared to polycrystalline films.
The nanowires achieve photoluminescence quantum yields (PLQY) ranging from 20 to 80%, and the bright photoluminescence can be tuned over most of the visible spectrum. Details regarding the solution growth process and resulting nanostructures are provided in the PNAS publication linked below.
Miniaturized light sources such as nanowire lasers are a promising direction for optoelectronics. Highly stable, wavelength tunable nanoscale light sources can be used for commercial applications in optical communications, data storage, sensing, and imaging. In the past, however, high temperature or low pressure conditions have been required to fabricate the nanoscale light sources. The Berkeley Lab technology is an improvement over earlier approaches because it can be fabricated in near-ambient conditions and it attains simultaneous synthetic control of material composition and nanowire morphology.
DEVELOPMENT STAGE: Proven principle
FOR MORE INFORMATION:
Eaton, S., Lai, M., Gibson, N., Wong, A., Dou, L., Ma, J., Wang, L.-W., Leone, S., and Yang, P. “Lasing in robust cesium lead halide perovskite nanowires,” PNAS, doi: 10.1073/pnas.1600789113 (2016).
STATUS: Patent pending. Available for licensing or collaborative research.
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