Photovoltaic Materials, Devices, and Technologies

Optimization of hybrid organic/inorganic poly(3-hexylthiophene-2,5-diyl)/silicon solar cells

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

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

J. Photon. Energy. 6(2), 025504 (May 18, 2016). doi:10.1117/1.JPE.6.025504
History: Received March 21, 2016; Accepted April 21, 2016
Text Size: A A A

Abstract.  In the last years, hybrid organic/silicon solar cells have attracted great interest in photovoltaic research due to their potential to become a low-cost alternative for the conventionally used silicon pn-junction solar cells. This work is focused on hybrid solar cells based on the polymer poly(3-hexylthiophene-2,5-diyl), which was deposited on n-doped crystalline silicon via spin-coating under ambient conditions. By employing an anisotropic etching step with potassium hydroxide (KOH), the reflection losses at the silicon surface were reduced. Hereby, the short-circuit current density of the hybrid devices was increased by 31%, leading to a maximum power conversion efficiency (PCE) of 13.1% compared to a PCE of 10.7% for the devices without KOH etching. In addition, the contacts were improved by replacing gold with the more conductive silver as top grid material to reduce the contact resistance and by introducing a thin (0.5  nm) lithium fluoride layer between the silicon and the aluminum backside contact to improve electron collection and hole blocking. Hereby, the open-circuit voltage and the fill factor of the hybrid solar cells were further improved and devices with very high PCE up to 14.2% have been realized.

Figures in this Article
© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Martin Weingarten ; Simon Sanders ; Dominik Stümmler ; Pascal Pfeiffer ; Andrei Vescan, et al.
"Optimization of hybrid organic/inorganic poly(3-hexylthiophene-2,5-diyl)/silicon solar cells", J. Photon. Energy. 6(2), 025504 (May 18, 2016). ; http://dx.doi.org/10.1117/1.JPE.6.025504


Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

PubMed Articles
Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.