TY - JOUR
T1 - Air Environment Degradation of a High-Performance Inverted PTB7-Th:PC 70 BM Solar Cell
AU - Lastra, Gonzalo
AU - Balderrama, Victor S.
AU - Resendiz, Luis
AU - Pallares, Josep
AU - Marsal, Lluis F.
AU - Cabrera, Victor
AU - Estrada, Magali
N1 - Publisher Copyright:
© 2011-2012 IEEE.
PY - 2019/3
Y1 - 2019/3
N2 - In this paper, the degradation of the electrical parameters of a high-performance inverted PTB7-Th:PC 70 BM solar cell, having an efficiency of 10.95%, is analyzed. The cathode side is formed by indium tin oxide (ITO) material in contact with 10 nm of Poly[(9,9-bis(3'-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene) (PFN) and 0.6 nm of lithium fluoride. The anode side is formed by V 2 O 5 (hole-transport layer) in contact with Ag metal. The current density-voltage (J-V) curves, as well as the short-circuit current (J SC ), open-circuit voltage (V OC ), fill factor, and power conversion efficiency parameters, were obtained from fabricated inverted organic solar cells (OSCs). The degradation of these parameters was measured as a function of time when the devices were exposed to an air environment. A metal-insulator-metal model was implemented using the device simulator Silvaco/ATLAS technology computer-aided design (TCAD) to simulate the degradation of the cells. The experimental and simulated J-V curves show good agreement on the fourth quadrant. To verify our model, a second structure was fabricated (ITO/PFN/PTB7:PC 70 BM/V 2 O 5 /Ag) and the experimental results were successfully fitted, which indicated that the proposed procedure can be used to predict the degradation behavior of an inverted OSC when it is exposed to ambient air.
AB - In this paper, the degradation of the electrical parameters of a high-performance inverted PTB7-Th:PC 70 BM solar cell, having an efficiency of 10.95%, is analyzed. The cathode side is formed by indium tin oxide (ITO) material in contact with 10 nm of Poly[(9,9-bis(3'-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene) (PFN) and 0.6 nm of lithium fluoride. The anode side is formed by V 2 O 5 (hole-transport layer) in contact with Ag metal. The current density-voltage (J-V) curves, as well as the short-circuit current (J SC ), open-circuit voltage (V OC ), fill factor, and power conversion efficiency parameters, were obtained from fabricated inverted organic solar cells (OSCs). The degradation of these parameters was measured as a function of time when the devices were exposed to an air environment. A metal-insulator-metal model was implemented using the device simulator Silvaco/ATLAS technology computer-aided design (TCAD) to simulate the degradation of the cells. The experimental and simulated J-V curves show good agreement on the fourth quadrant. To verify our model, a second structure was fabricated (ITO/PFN/PTB7:PC 70 BM/V 2 O 5 /Ag) and the experimental results were successfully fitted, which indicated that the proposed procedure can be used to predict the degradation behavior of an inverted OSC when it is exposed to ambient air.
KW - Fill factor (FF)
KW - PTB7-Th:PC BM blend
KW - numerical simulation
KW - organic solar cell (OSC)
UR - http://www.scopus.com/inward/record.url?scp=85062212709&partnerID=8YFLogxK
U2 - 10.1109/JPHOTOV.2019.2892108
DO - 10.1109/JPHOTOV.2019.2892108
M3 - Artículo
SN - 2156-3381
VL - 9
SP - 464
EP - 468
JO - IEEE Journal of Photovoltaics
JF - IEEE Journal of Photovoltaics
IS - 2
M1 - 8624522
ER -