Enhanced open-circuit voltages and efficiencies: the role of oxidation state of molybdenum oxide buffer layer in polymer solar cells.

ABSTRACT: Molybdenum oxide (MoO _x ) is widely used as a buffer layer in optoelectronic devices to improve the charge extraction efficiency. The oxidation state of MoO _x plays an important role in determining its electrical properties. However, there are few studies on the oxidation state to further guide the optimization of the MoO _x buffer layer. In this work, inverted-structured polymer solar cells (PSCs) with a MoO _x buffer layer were fabricated. Post-air annealing was used to control the cation valence state in MoO _x . X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), atomic force microscopy (AFM) and transient photocurrent (TPC) were employed to study the valence state,

SUBMITTER: Ma P 

PROVIDER: S-EPMC9042880 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature