POS6-0326
Optimization of Indoor Light Organic Photovoltaics and Development of Smart Sensor Control System through Aging Chamber-based Evaluation
When and Where
Nov 30, -0001
12:00am - 12:00am
Presenter(s)
Bogyeong Jeon (Pukyong National University)
Co-Author(s)
Abstract
Organic photovoltaic (OPV) devices have attracted considerable attention because of their lightweight, flexibility, and strong performance under indoor lighting. As the power requirements for electronic devices have gradually decreased result from technological advancements, research into indoor photovoltaics is actively conducted to provide semi-permanent power supply for low-power electronic devices.
Among various photoactive layer structures, bulk-heterojunction (BHJ) and bilayer structures have been widely studied. But, previous studies have mainly focused on comparing the performance of BHJ and bilayer structures under 1 Sun, and no systematic research under indoor light has not been sufficiently compared and characterized.
In this study, we investigated stability properties under indoor light conditions, by comparing BHJ and bilayer OPVs with PBDB-T as a donor and IT-4F as an acceptor. The photovoltaic parameters of the BHJ and bilayer OPVs were carefully evaluated with stabilized and uniform indoor lighting conditions as well as controlled ambient temperatures and humidity by using a home-built aging chamber. We found that bilayer OPVs exhibited better device stability under indoor lighting conditions, compared to that of BHJs. Especially photocurrents drop was smaller in bilayer OPVs, suggesting its better morphological stability compared to that of BHJs. Also transient photocurrents data were compared before and after aging of indoor light, and bilayer devices showed faster charge extraction time even after aging. By using this excellent device stability under indoor lighting conditions of bilayer OPVs, we demonstrated a smart temperature and humidity control system, suggesting the potential of bilayer OPVs as sustainable self-powered energy sources for future internet of things (IoT) applications.
Among various photoactive layer structures, bulk-heterojunction (BHJ) and bilayer structures have been widely studied. But, previous studies have mainly focused on comparing the performance of BHJ and bilayer structures under 1 Sun, and no systematic research under indoor light has not been sufficiently compared and characterized.
In this study, we investigated stability properties under indoor light conditions, by comparing BHJ and bilayer OPVs with PBDB-T as a donor and IT-4F as an acceptor. The photovoltaic parameters of the BHJ and bilayer OPVs were carefully evaluated with stabilized and uniform indoor lighting conditions as well as controlled ambient temperatures and humidity by using a home-built aging chamber. We found that bilayer OPVs exhibited better device stability under indoor lighting conditions, compared to that of BHJs. Especially photocurrents drop was smaller in bilayer OPVs, suggesting its better morphological stability compared to that of BHJs. Also transient photocurrents data were compared before and after aging of indoor light, and bilayer devices showed faster charge extraction time even after aging. By using this excellent device stability under indoor lighting conditions of bilayer OPVs, we demonstrated a smart temperature and humidity control system, suggesting the potential of bilayer OPVs as sustainable self-powered energy sources for future internet of things (IoT) applications.
