The effect of a buffer layer on the photovoltaic properties of solar cells with P3OT:fullerene composites

We have studied the effect of buffer layers such as poly(3,4-ethylene dioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), copper phthalocyanine (CuPC), and gold metal on the photovoltaic properties of solar cells with poly(3-octylthiophene) (P3OT):fullerene composites. The device structure is ITO/bu...

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Bibliographic Details
Published in:Synthetic metals 2005-09, Vol.153 (1), p.97-100
Main Authors: Yoo, Insun, Lee, Munjae, Lee, Changhee, Kim, Dae-Won, Moon, In Sik, Hwang, Do-Hoon
Format: Article
Language:English
Subjects:
Application fields
Applied sciences
Buffer layer
Energy
Exact sciences and technology
Natural energy
Organic solar cell
Photovoltaic conversion
Photovoltaic properties
Polymer industry, paints, wood
Solar cells. Photoelectrochemical cells
Solar energy
Technology of polymers
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Summary:We have studied the effect of buffer layers such as poly(3,4-ethylene dioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), copper phthalocyanine (CuPC), and gold metal on the photovoltaic properties of solar cells with poly(3-octylthiophene) (P3OT):fullerene composites. The device structure is ITO/buffcr/P3OT:C60/BCP/LiF/Al where bathocuproine (BCP) was used as an exciton-blocking layer. The cell with a PEDOT:PSS buffer layer exhibits an open circuit voltage of V oc ∼ 0.4 V and the power conversion efficiency of η ∼ 1.8%. The incident photon to collected election efficiency (IPCE) is about 30% at 520 nm. The cell with a CuPC buffer layer exhibits slightly higher V oc ∼ 0.46 V and power efficiency of η ∼ 2.1%. This result indicates that a good buffer layer at the polymer/electrode interfaces can enhance the V oc. and die power conversion efficiency.
ISSN:0379-6779
1879-3290
DOI:10.1016/j.synthmet.2005.07.182