None of the solar cells produced to date shows external photocurrent quantum efficiencies greater than 100 percent from any portion of the solar spectral irradiance band.
Funding for the research was provided by the U.S. Department of Energy’s (DOE’s) Office of Science, which funds NREL and 11 other laboratoriesoperated under the aegis of the DOE to extend energy efficiency and renewable energy technologies.Solar experts are calling it the type of advance that will lead to Next Generation (highly efficient and cheap) Solar Cells, and an era of cheap solar energy which could rival electricity from fossil fuels or nuclear fisson. This is known as “grid parity.”
The abstract to the paper, called “Peak External Photocurrent Quantum Efficiency Exceeding 100% via MEG in a Quantum Dot Solar Cell,” is available here. The paper itself is only available for a fee. The authors are NREL scientists Joseph M. Luther, Sukgeun Choi, Hsiang-Yu Chen, Jianbo Gao, Matthew C. Beard, Octavi E. Semonin and Arthur J. Nozik; Semonin and Nozik are also affiliated with the University of Colorado at Boulder.
- Form wider bandgaps as size decreases
- Create excitons at normal temperatures
- Enhance particle coupling
- Improve MEG processes