Interface recombination was studied in colloidal quantum dot photovoltaics. Optimization of the TiO2 -PbS interface culminated in the introduction of a thin ZnO buffer layer deposited with atomic layer deposition. Transient photovoltage measurements indicated a nearly two-fold decrease in the recombination rate around 1 sun operating conditions. Improvement to the recombination rate led to a device architecture with superior open circuit voltage (VOC) and photocurrent extraction. Overall a 10% improvement in device efficiency was achieved with Voc enhancements up to 50 mV being realized.
|Original language||English (US)|
|Number of pages||6|
|Journal||Advanced Energy Materials|
|State||Published - Jul 2013|
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)