Semi-transparent tandem organic solar cells with 90% internal quantum efficiency
Date
2012
Authors
Tang, Z.
George, Z.
Ma, Z.
Bergqvist, J.
Tvingstedt, K.
Vandewal, K.
Wang, E.
Andersson, L.M.
Andersson, M.R.
Zhang, F.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Advanced Energy Materials, 2012; 2(12):1467-1476
Statement of Responsibility
Conference Name
Abstract
Semi-transparent (ST) organic solar cells with potential application as power generating windows are studied. The main challenge is to find proper transparent electrodes with desired electrical and optical properties. In this work, this is addressed by employing an amphiphilic conjugated polymer PFPA-1 modified ITO coated glass substrate as the ohmic electron-collecting cathode and PEDOT:PSS PH1000 as the hole-collecting anode. For active layers based on different donor polymers, considerably lower reflection and parasitic absorption are found in the ST solar cells as compared to solar cells in the standard geometry with an ITO/PEDOT:PSS anode and a LiF/Al cathode. The ST solar cells have remarkably high internal quantum efficiency at short circuit condition ( ∼ 90%) and high transmittance ( ∼ 50%). Hence, efficient ST tandem solar cells with enhanced power conversion efficiency ( PCE ) compared to a single ST solar cell can be constructed by connecting the stacked two ST subcells in parallel. The total loss of photons by reflection, parasitic absorption and transmission in the ST tandem solar cell can be smaller than the loss in a standard solar cell based on the same active materials. We demonstrate this by stacking fi ve separately prepared ST cells on top of each other, to obtain a higher photocurrent than in an optimized standard solar cell.
School/Discipline
Dissertation Note
Provenance
Description
Access Status
Rights
Copyright 2012 Wiley