TY - JOUR
T1 - Optimization of organic photovoltaic device performance via exciton generation profile adjustment
AU - Quiroz-Sánchez, Juan Carlos
AU - Cabrera-Arenas, Víctor
AU - Villa-Angulo, Carlos
N1 - Publisher Copyright:
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE).
PY - 2015/1/1
Y1 - 2015/1/1
N2 - We analyzed the conversion performance of conventional organic photovoltaic (OPV) and inverted organic photovoltaic (IOPV) devices with an active layer of polymer, PTB7: P70BM. We computed the current density-voltage (JV) curves, short-circuit current density (Jsc), open-circuit voltage (Voc), maximum current density (Jmax), maximum power density (Pmax), and fill-factor (FF) under various scenarios. We employed the one-dimensional optical transfer matrix theory to calculate the light intensity that was then used as the input at the active layer for optical carrier generation. Then we obtained electrical performance parameters from the JV curves plotted by solving Poisson and charge transport equations. The effects of adjusting the exciton generation profile by tuning the active layer width and optical spacer thickness under 100 mW·cm-2 air mass 1.5 global (AM 1.5G) illumination are also analyzed. In addition, the effect on the conversion performance by using different electron and hole mobility relations in the polymers composing the active layer is computed. To identify the optimal performance, we proposed an exciton generation profile that maintains a constant amplitude when shifted through the active layer. Subsequently, by adjusting the active layer width, optical spacer thickness, and electron and hole mobility, we found that the OPV structure achieved performance characteristics previously reported only for IOPV structures.
AB - We analyzed the conversion performance of conventional organic photovoltaic (OPV) and inverted organic photovoltaic (IOPV) devices with an active layer of polymer, PTB7: P70BM. We computed the current density-voltage (JV) curves, short-circuit current density (Jsc), open-circuit voltage (Voc), maximum current density (Jmax), maximum power density (Pmax), and fill-factor (FF) under various scenarios. We employed the one-dimensional optical transfer matrix theory to calculate the light intensity that was then used as the input at the active layer for optical carrier generation. Then we obtained electrical performance parameters from the JV curves plotted by solving Poisson and charge transport equations. The effects of adjusting the exciton generation profile by tuning the active layer width and optical spacer thickness under 100 mW·cm-2 air mass 1.5 global (AM 1.5G) illumination are also analyzed. In addition, the effect on the conversion performance by using different electron and hole mobility relations in the polymers composing the active layer is computed. To identify the optimal performance, we proposed an exciton generation profile that maintains a constant amplitude when shifted through the active layer. Subsequently, by adjusting the active layer width, optical spacer thickness, and electron and hole mobility, we found that the OPV structure achieved performance characteristics previously reported only for IOPV structures.
KW - conventional organic photovoltaic and inverted structures
KW - organic photovoltaic devices
KW - polymer PTB7:PCBM
UR - http://www.scopus.com/inward/record.url?scp=84944145040&partnerID=8YFLogxK
U2 - 10.1117/1.JPE.5.052098
DO - 10.1117/1.JPE.5.052098
M3 - Artículo
SN - 1947-7988
VL - 5
JO - Journal of Photonics for Energy
JF - Journal of Photonics for Energy
IS - 1
M1 - 052098
ER -