Near-infrared absorbing semitransparent organic solar cells

Journal article

We present efficient, semitransparent small molecule organic solar cells. The devices employ an indium tin oxide-free top contact, consisting of thin metal films and an additional organic capping layer for enhanced light in/outcoupling. The solar cell encorporates a bulk heterojunction with the donor material Ph₂-benz-bodipy, an infrared absorber. Combination of Ph₂-benz-bodipy with C₆₀ as acceptor leads to devices with high open circuit voltages of up to 0.81 V and short circuit current densities of 5–6 mA/cm², resulting in efficiences of 2.2%–2.5%. At the same time, the devices are highly transparent, with an average transmittance in the visible range (400–750 nm) of up to 47.9%, with peaks at 538 nm of up to 64.2% and an average transmittance in the yellow-green range of up to 61.8%. © 2011 American Institute of Physics.

Authors: Meiss, J; Holzmueller, F; Gresser, R; Leo, K; Riede, M

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: American Institute of Physics
• Journal: Applied Physics Letters
• Volume: 99
• Issue: 19
• Article number: 193307
• Publication date: 2011-11-07
• DOI: 10.1063/1.3660708
• ISSN: 0003-6951
• Language: English