Photovoltaic Materials, Devices, and Technologies

Investigation of organic semiconductor interlayers in hybrid PEDOT:PSS/silicon solar cells

[+] Author Affiliations
Martin Weingarten, Thorsten Zweipfennig, Simon Sanders, Dominik Stümmler, Pascal Pfeiffer, Andrei Vescan, Holger Kalisch

RWTH Aachen University, Device Technology, Sommerfeldstraße 24, 52074 Aachen, Germany

J. Photon. Energy. 6(4), 045503 (Nov 07, 2016). doi:10.1117/1.JPE.6.045503
History: Received September 5, 2016; Accepted October 10, 2016
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Abstract.  In the last years, hybrid organic/inorganic solar cells have attracted great interest in photovoltaic research due to their expected potential to combine the advantages of both material classes, the excellent electrical properties and stability of the inorganic and the low-cost processability of the organic semiconductors. This work is focused on hybrid solar cells based on n-doped crystalline Si as the inorganic and the polymer poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) as the organic part of the device. The hole-conducting organic semiconductors poly(3-hexylthiophene-2,5-diyl) (P3HT) and 2,2′,7,7′-Tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene (Spiro-MeOTAD) are investigated as electron blocking interlayers to reduce the parasitic electron current into the metal top contact and thereby increase the efficiency of the solar cell. In this context, P3HT is identified to be insufficient as an interlayer material due to unfavorable hysteresis effects. On the other hand, for solar cells with a Spiro-MeOTAD interlayer, the power conversion efficiency (PCE) is significantly increased. This is mainly attributed to an increased short-circuit current density. For the best performing device, a PCE of 14.3% is achieved, which is one of the highest values reported for this type of hybrid solar cells so far.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Martin Weingarten ; Thorsten Zweipfennig ; Simon Sanders ; Dominik Stümmler ; Pascal Pfeiffer, et al.
"Investigation of organic semiconductor interlayers in hybrid PEDOT:PSS/silicon solar cells", J. Photon. Energy. 6(4), 045503 (Nov 07, 2016). ; http://dx.doi.org/10.1117/1.JPE.6.045503


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