Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 19, Pages 10556-10562Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b02203
Keywords
transparent electrode; inorganic-organic heterojunction solar cell; nanowire network; direct laser sintering; solution processing
Funding
- National Science Foundation via the MRSEC at Princeton [DMR-0819860]
- Rutgers-Princeton NSF-IGERT on Nanotechnology for Clean Energy
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In this Research Article, we demonstrate pulsed laser processing of a silver nanowire network transparent conductor on top of an otherwise complete Solar cell. The macroscopic pulsed laser irradiation serves to sinter nanowire-nanowire junctions on the nanoscale, leading to a much more conductive electrode. We fabricate hybrid silicon/organic heterojunction photovoltaic devices, which have ITO-free, solution processed, and laser processed transparent electrodes. Furthermore, devices which have high resistive losses-Show up to a 35% increase in power conversion efficiency after laser processing. We perform this study over a range of laser fluences, and a range of nanowire area coverage to investigate the sintering mechanism of nanowires inside of a device stack. The increase in device performance is modeled using a simple photovoltaic diode approach and compares favorably to the experimental data.
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