TY - JOUR
T1 - Portable integrated photo-charging storage device operating at 3 V
AU - Han, Juyeon
AU - Lee, Junyeong
AU - Jang, Eunbin
AU - Kim, Myeongjin
AU - Cha, Hyojung
AU - Jo, Sungjin
AU - Yoo, Jeeyoung
N1 - Publisher Copyright:
© 2022
PY - 2022/12/15
Y1 - 2022/12/15
N2 - The integration of an energy harvesting device and an energy storage device into one unit has been widely studied as a distributed power source. Herein, we propose a high-voltage-driven photo-charging storage device, integrating a series-connected perovskite solar cell and an ionogel-based solid supercapacitor. The photo-charging storage device exhibits high overall efficiencies of 13.17 % and 9.87 % at 1 mA cm−2 and 20 mA cm−2, respectively, attributed to its high storage efficiency of over ∼ 70 % at all discharge current densities. This high discharge current density of 20 mA cm−2 is the record value for all reported integrated solar cells and electric double-layer capacitor systems. Moreover, the photo-charging storage device maintains 78.6 % of its overall efficiency after 100 cycles under AM 1.5 G illumination and exhibits remarkable cycle performance under indoor light illumination. To understand the interfacial behavior of the photo-charging storage device, impedance spectroscopy is performed for the first time. In addition, to avoid the decomposition of the perovskite solar cell active layer with moisture, an encapsulation process is conducted, which enables the device to remain operational at 3 V after 8 weeks. These results underline the high potential of this photo-charging storage device as a portable power source.
AB - The integration of an energy harvesting device and an energy storage device into one unit has been widely studied as a distributed power source. Herein, we propose a high-voltage-driven photo-charging storage device, integrating a series-connected perovskite solar cell and an ionogel-based solid supercapacitor. The photo-charging storage device exhibits high overall efficiencies of 13.17 % and 9.87 % at 1 mA cm−2 and 20 mA cm−2, respectively, attributed to its high storage efficiency of over ∼ 70 % at all discharge current densities. This high discharge current density of 20 mA cm−2 is the record value for all reported integrated solar cells and electric double-layer capacitor systems. Moreover, the photo-charging storage device maintains 78.6 % of its overall efficiency after 100 cycles under AM 1.5 G illumination and exhibits remarkable cycle performance under indoor light illumination. To understand the interfacial behavior of the photo-charging storage device, impedance spectroscopy is performed for the first time. In addition, to avoid the decomposition of the perovskite solar cell active layer with moisture, an encapsulation process is conducted, which enables the device to remain operational at 3 V after 8 weeks. These results underline the high potential of this photo-charging storage device as a portable power source.
KW - Indoor charging
KW - Monolithic integration
KW - Perovskite solar cells
KW - Photo-charging storage devices
KW - Supercapacitors
UR - http://www.scopus.com/inward/record.url?scp=85135717134&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2022.138463
DO - 10.1016/j.cej.2022.138463
M3 - Article
AN - SCOPUS:85135717134
SN - 1385-8947
VL - 450
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 138463
ER -