LONG-TERM OPERATION TESTS OF ORGANIC SOLID-STATE SOLAR CELLS

Hiroki Shiokawa, Masaaki Yokoyama and Masahiro Hiramoto
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Hiroki Shiokawa: Material and Life Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka Suita, Osaka 565-0871, Japan
Masaaki Yokoyama: Center for Advanced Science and Innovation, Osaka University, 2-1 Yamada-oka Suita, Osaka 565-0871, Japan
Masahiro Hiramoto: Material and Life Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka Suita, Osaka 565-0871, Japan

Surface Review and Letters (SRL), 2007, vol. 14, issue 04, 539-542

Abstract: The long-term operation tests of two types of solid-state organic photovoltaic (OPV) cells, p–n heterojunction type cells and p–i–n junction type cells, were performed. In both cells, a drastic decrease in photocurrent within 1 h was observed in air. This rapid decrease was revealed to be caused by oxygen molecules which act as a electron trap in the electron transporting organic layer. Initial decrease of photocurrent was effectively suppressed under high vacuum (10-7Torr). In the case of a p–n type cell, the decrease in short-circuit photocurrent was only 15% even under prolonged light irradiation of 260 h.

Keywords: Organic solid-state solar cell; long-term operation test; pn junction; p–i–n junction; atmospheric effect; oxygen trap (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1142/S0218625X07009803

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