e-Article
Nanoimprinting of perovskite layer for light-harvesting effect in photovoltaic devices
Document Type
Article
Author
Source
(2022): 407-414.
Subject
Language
Korean
ISSN
17388090
Abstract
A light-harvesting effect was successfully achieved in photovoltaic devices by the structuring of an active perovskite layerthrough nanoimprinting. This was done by transforming a commercial CD-R pattern into a polydimethylsiloxane (PDMS)film. The latter was then used for replicating the perovskite layers under increased pressures and temperatures. The Young’smodulus of the PDMS film was regulated by the mixing ratio of the base and curing agents, and the average height of thepattern was reported for an optimal 5:1 base-to-curing agent ratio. Under these conditions, the replication efficiency reached80% at a pressure of ~ 4.9 kPa. To investigate the manner in which the structuring of these patterned perovskite layersaffects optoelectronic devices, we incorporated them into photovoltaic cells. This resulted in improved J–V characteristics,as observed from an increase in both fill factor (FF) and short circuit current density (Jsc), from 73.20 to 76.35% and from12.853 to 15.532 mA cm−2, respectively. The increase in FF was attributed to a large contact area between the perovskiteand electron transport layers, while the increase in Jsc was due to the enhanced light-trapping of the periodic grating patternsof the perovskite layer.
A light-harvesting effect was successfully achieved in photovoltaic devices by the structuring of an active perovskite layerthrough nanoimprinting. This was done by transforming a commercial CD-R pattern into a polydimethylsiloxane (PDMS)film. The latter was then used for replicating the perovskite layers under increased pressures and temperatures. The Young’smodulus of the PDMS film was regulated by the mixing ratio of the base and curing agents, and the average height of thepattern was reported for an optimal 5:1 base-to-curing agent ratio. Under these conditions, the replication efficiency reached80% at a pressure of ~ 4.9 kPa. To investigate the manner in which the structuring of these patterned perovskite layersaffects optoelectronic devices, we incorporated them into photovoltaic cells. This resulted in improved J–V characteristics,as observed from an increase in both fill factor (FF) and short circuit current density (Jsc), from 73.20 to 76.35% and from12.853 to 15.532 mA cm−2, respectively. The increase in FF was attributed to a large contact area between the perovskiteand electron transport layers, while the increase in Jsc was due to the enhanced light-trapping of the periodic grating patternsof the perovskite layer.
A light-harvesting effect was successfully achieved in photovoltaic devices by the structuring of an active perovskite layerthrough nanoimprinting. This was done by transforming a commercial CD-R pattern into a polydimethylsiloxane (PDMS)film. The latter was then used for replicating the perovskite layers under increased pressures and temperatures. The Young’smodulus of the PDMS film was regulated by the mixing ratio of the base and curing agents, and the average height of thepattern was reported for an optimal 5:1 base-to-curing agent ratio. Under these conditions, the replication efficiency reached80% at a pressure of ~ 4.9 kPa. To investigate the manner in which the structuring of these patterned perovskite layersaffects optoelectronic devices, we incorporated them into photovoltaic cells. This resulted in improved J–V characteristics,as observed from an increase in both fill factor (FF) and short circuit current density (Jsc), from 73.20 to 76.35% and from12.853 to 15.532 mA cm−2, respectively. The increase in FF was attributed to a large contact area between the perovskiteand electron transport layers, while the increase in Jsc was due to the enhanced light-trapping of the periodic grating patternsof the perovskite layer.