Fig. 5: Deterioration of hole transport in films by photooxidation.
From: Nanomorphology dependence of the environmental stability of organic solar cells
J–V characteristics of symmetric hole-only devices based on a pristine PTB7, b 80:20% PTB7:PCBM blend, and c 50:50% PTB7:PCBM blend during the aging process before top electrode deposition. The hole-only device had a structure of ITO/PEDOT:PSS/PTB7:PCBM/MoO3/Al. d The evolution of the hole mobilities of the PTB7:PCBM blends during the aging process. e GIXD scattering profiles along the in-plane (left panel) and out-of-plane (right panel) directions of the PTB7:PCBM blends before (solid lines) and after (dashed lines) aging for 120 min.
