Tilted bulk heterojunction organic photovoltaic cells grown by oblique angle deposition
作者： Ning Li , Stephen R. Forrest
DOI: 10.1063/1.3236838
关键词: Energy conversion efficiency 、 Substrate (electronics) 、 Organic semiconductor 、 Indium tin oxide 、 Vacuum deposition 、 Heterojunction 、 Polymer solar cell 、 Quantum efficiency 、 Optoelectronics 、 Materials science
摘要: We demonstrate small molecule bulk heterojunction organic photovoltaic cells using oblique angle vacuum deposition. Obliquely deposited donor chloroaluminum phthalocyanine (ClAlPc) films on indium tin oxide have surface feature sizes of ∼30 nm, resulting in ClAlPc/C60 donor-acceptor heterojunctions (HJs) with approximately twice the interface area HJs grown at normal incidence. This results nearly external quantum efficiency ClAlPc absorption band compared analogous, planar HJs. The increase is attributed to increased presented by junction incident illumination protrusions lying obliquely substrate plane formed during power conversion improves from (2.0±0.1)% (2.8±0.1)% under 1 sun, AM 1.5G simulated solar illumination. Similarly, copper phthalocyanine/C60 (1.3±0.1)% (1.7±0.1)%.
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