17 October 2013 Efficiency enhancement in small molecular organic photovoltaic devices employing dual anode interfacial layers
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Abstract
We demonstrated enhanced efficiency in small molecule organic photovoltaic devices using dual organic interfacial layers of PEDOT:PSS followed by tetracene between the ITO anode and the organic donor material. The use of a small molecular templating layer, such as tetracene, proved to increase the molecular stacking of the subsequent phthalocyanine (Pc) based donor materials. Upon application in planar heterojunction devices of ZnPc and C60, an enhancement of over 80 percent in the donor contribution to the external quantum efficiency was observed attributed to the combination of exciton blocking by the higher band gap tetracene layer and enhanced exciton diffusion and charge transport resulting from the increased crystallinity.
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Tyler Fleetham, Tyler Fleetham, Barry O'Brien, Barry O'Brien, John P. Mudrick, John P. Mudrick, Jiangeng Xue, Jiangeng Xue, Jian Li, Jian Li, } "Efficiency enhancement in small molecular organic photovoltaic devices employing dual anode interfacial layers", Proc. SPIE 8830, Organic Photovoltaics XIV, 883009 (17 October 2013); doi: 10.1117/12.2023679; https://doi.org/10.1117/12.2023679
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