Title
Monolithic two-terminal hybrid a-Si:H/CIGS tandem cells
Author
Blanker, J.
Vroon, Z.A.E.P.
Zeman, M.
Smets, A.
Publication year
2018
Abstract
Copper-indium-gallium-di-selenide (CIGS) is the present record holder in lab-scale thin-film photovoltaics (TF-PV). One of the problems of this PV technology is the scarcity of indium. Multi-junction solar cells allow better spectral utilization of the light spectrum, while the required current generation per layer is much lower, allowing much thinner absorber layers of CIGS. In this contribution we demonstrate working fabricated devices of CIGS bottom cells that are monolithically integrated with a hydrogenated amorphous silicon (a-Si:H) top cell. The proposed structures are a unique fusion of two distinct fabrication methods, being co-evaporation and plasma enhanced chemical vapor deposition (PE-CVD). In addition, devices without any ZnO have been processed. In those cells a nc-SiOx:H n-layer acted as an electron recipient and lateral insulator for the CIGS p-layer, and a highly p- and n-doped nc-SiOx:H layer served as the tunnel recombination junction. The top TCO on the a-Si:H cell was varied with ZnO:Al (AZO) and In2O3/Sn2O3 (ITO). Efficiencies of the not yet optimized devices have reached 7.9% active area efficiency (with Voc=1.23V, FF=64%, Jsc= 9.95 mA/cm2). © 2017 IEEE. Newport
Subject
Amorphous silicon
Copper compounds
Doping (additives)
Efficiency
Gallium compounds
II-VI semiconductors
Indium compounds
Plasma CVD
Plasma enhanced chemical vapor deposition
Zinc oxide
Active-area efficiency
Current generation
Hydrogenated amorphous silicon (a-Si:H)
Monolithically integrated
Plasma enhanced chemical vapor depositions (PE CVD)
Spectral utilization
Thin film photovoltaics
Tunnel recombination junctions
Multi-junction solar cells
To reference this document use:
http://resolver.tudelft.nl/uuid:eae30cd2-a482-41f3-b41b-fc547a9efc04
TNO identifier
810208
Publisher
Institute of Electrical and Electronics Engineers Inc.
ISBN
9781509056057
Source
44th IEEE Photovoltaic Specialist Conference, PVSC 2017. 25 June 2017 through 30 June 2017, 1-4
Document type
conference paper