Influence of Electrode Surface Composition and Energetics on Small-Molecule Organic Solar Cell Performance: Polar versus Nonpolar Donors on Indium Tin Oxide Contacts
作者： Jeremy Gantz , Diogenes Placencia , Anthony Giordano , Seth R. Marder , Neal R. Armstrong
DOI: 10.1021/JP307546V
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摘要: We present a systematic study of the band-edge energy offsets and shifts in local vacuum levels for indium tin oxide (ITO)/donor heterojunctions, using vacuum-deposited chloroindium phthalocyanine (ClInPc), titanyl (TiOPc), pentacene (PEN), copper (CuPc) donor layers. include comparison performance ITO/donor/C60 planar heterojunction (PHJ) organic solar cells (OPVs) as function activation modification ITO contact. UV photoemission spectroscopy (UPS) was used to characterize interfacial region between these donors infer ordering first deposited 1–2 monolayers modification. For polar ClInPc TiOPc, on air plasma (AP) treated, high work (φeff ≈ 5.1–5.2 eV), level observed during deposition two molecules suggest that halo–metal or oxo–metal bond points (on average) toward surfa...
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