16 April 2008 1,4,5,8-Naphthalenetetracarboxylic dianhydride as transparent electron transport material in organic p-i-n solar cells
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Abstract
The transparent electron transport material NTCDA (1,4,5,8-naphthalenetetracarboxylic dianhydride) was examined in order to find a suitable substitute for C60 which is today often used in small molecular organic solar cells as transport layer. Due to its wide band gap, NTCDA does not absorb in the visible range and is furthermore exciton blocking. By doping with AOB (acridine orange base), its conductivity was raised to about 1 • 10-4S/cm. It can therefore simultaneously be used as electron transport material and optical spacer in p-i-n type solar cells, leading to power conversion efficiencies of up to 2.83%. Additionally, an investigation of the surface morphology using AFM was performed.
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C. Falkenberg, C. Uhrich, B. Maennig, M. K. Riede, K. Leo, "1,4,5,8-Naphthalenetetracarboxylic dianhydride as transparent electron transport material in organic p-i-n solar cells", Proc. SPIE 6999, Organic Optoelectronics and Photonics III, 69990S (16 April 2008); doi: 10.1117/12.782340; https://doi.org/10.1117/12.782340
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