Guanidinium: A Route to Enhanced Carrier Lifetime and Open-Circuit Voltage in Hybrid Perovskite Solar Cells
University of California, Los Angeles · California NanoSystems Institute
Abstract
Hybrid perovskites have shown astonishing power conversion efficiencies owed to their remarkable absorber characteristics including long carrier lifetimes, and a relatively substantial defect tolerance for solution-processed polycrystalline films. However, nonradiative charge carrier recombination at grain boundaries limits open circuit voltages and consequent performance improvements of perovskite solar cells. Here we address such recombination pathways and demonstrate a passivation effect through guanidinium-based additives to achieve extraordinarily enhanced carrier lifetimes and higher obtainable open circuit voltages. Time-resolved photoluminescence measurements yield carrier lifetimes in…
Citation impact
- FWCI
- 41.10
- Percentile
- 100%
- References
- 32
Authors
10- NDNicholas De MarcoCorresponding
University of California, Los Angeles, California NanoSystems Institute
- HZHuanping Zhou
University of California, Los Angeles, California NanoSystems Institute
- QCQi Chen
California NanoSystems Institute, University of California, Los Angeles
- PSPengyu Sun
University of California, Los Angeles, California NanoSystems Institute
- ZLZonghao Liu
University of California, Los Angeles, California NanoSystems Institute
Topics & keywords
- Passivation
- Perovskite (structure)
- Open-circuit voltage
- Grain boundary
- Carrier lifetime
- Photoluminescence
- Materials science
- Optoelectronics
- Affordable and clean energy