TY - JOUR
T1 - Improved efficiency of hybrid organic photovoltaics by pulsed laser sintering of silver nanowire network transparent electrode
AU - Spechler, Joshua A.
AU - Nagamatsu, Ken A.
AU - Sturm, James Christopher
AU - Arnold, Craig B.
N1 - Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/5/20
Y1 - 2015/5/20
N2 - 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.
AB - 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.
KW - direct laser sintering
KW - inorganic-organic heterojunction solar cell
KW - nanowire network
KW - solution processing
KW - transparent electrode
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U2 - 10.1021/acsami.5b02203
DO - 10.1021/acsami.5b02203
M3 - Article
C2 - 25914946
AN - SCOPUS:84930226736
SN - 1944-8244
VL - 7
SP - 10556
EP - 10562
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 19
ER -