Defect Dynamics in DJ Perovskite Solar Cells: Unraveling the Impact on Photovoltaic Performance

Unlocking the potential of solar energy, this study delves into DJ perovskite-based solar cells, where the dynamic (BEA) FA
2
Sn
3
I
10
takes center stage as the active layer. Pairing it with PEDOT: PSS as the hole transport hero and PCBM: C
60
as the electron transport material, we embark on a journey to unravel the impact of intermediary defect density tweaks on the cells' PV parameters. Through variations in IDDs (1X 10
¹⁰
– 1X10
¹⁵
cm
^-2
), we have analysed the impact of defect density variations sandwiched between PEDOT: PSS and (BEA) FA
2
Sn
3
I
10
layers, as well as (BEA) FA
2
Sn
3
I
10
and PCBM: C
60
layers. Armed with simulations, our quest reaches its zenith, marking a triumphant power conversion efficiency (PCE) of 11.05% by harnessing the potential of the PEDOT: PSS / (BEA) FA
2
Sn
3
I
10
/ PCBM: C
60
trinity, complete with a 350nm thick active layer and low IDDs. With the sunlit spoils comes a treasure trove of photovoltaic parameters: an open-circuit voltage (V
OC
) of 0.7V, a short-circuit current density (J
SC
) standing tall at 25.645 mA/cm
²
, a fill factor (FF) of a commendable 61.50%, and the pinnacle, an 11.05% PCE. These revelations not only beckon the age of more efficient DJ perovskite solar cells but also beckon a new dawn for amplified energy generation feasibility.