Abstract

In this study, we report on organic photovoltaics based on inverted structure with the photoactive layer sandwiched between lithium zinc oxide electron transport layer and PEDOT:PSS doped with V2O5 hole transport layer. The efficiency of the PEDOT:PSS device increases from 4.04 to 4.20% as we doped with V2O5. This inverted organic photovoltaic can retain efficiency with only 1.9% degradation after 3 weeks storage in ambient conditions. The degradation rate for PEDOT:PSS device is significantly higher (11.6%) compared to PEDOT:PSS doped with V2O5. The good stability in our device can be attributed to the air stable PEDOT:PSS doped with V2O5 HTL as the interfacial layers. It is found that the degradation rate decreases with increasing V2O5 concentration in PEDOT:PSS.

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