Multi-junction

Multi-junction PV Tandem Cells for Hydrogen Production 501... 

Promising conceptual development of novel planar, multi-junction PEC water-splitting cells... 

G. Gramaccioni, A. Selvaggi, and F. Galluzzi, Thin film multi-junction solar cell for water photoelectrolysis, EZecfroc/nm. Acfa 38(1), 111, 1993. 

Study multi-junction semiconductor systems for higher efficiency water splitting. 

Continue to design and test additional multi-junction systems (CuGalnSSe, GaPN, and GaInN materials, and a-Si triple junction systems) for possible photoelectrochemical water splitting. 

Develop multi-junction a-Si Ge and CIGS photovoltaic stmctures incorporating additional catalyst and protective thin film layers for use as hydrogen photoelectrodes. 

Fabricated initial set of multi-junction a-Si Ge devices for use in preliminary hybrid photoelectrode tests (with the University of Toledo). 

Design, fabricate and evaluate optimized multi-junction a-Si Ge hybrid photoelectrodes. 

Efforts are currently underway to fabricate and test prototype a-Si Ge/Fe203 hybrid devices. With the University of Toledo, we completed an evaluation of a-Si Ge device yield on different metal-foil substrates, and a series of multi-junction devices... 

Yang, J., Yan, B., Guha, S. Amorphous and nanocrystalline silicon-based multi-junction solar cells. Thin Solid Films 487, 162-169 (2005)... 

Yamaguchi, M. III-V compound multi-junction solar cells present and future. Solar Energy Mater. Solar Cells 75, 261-269 (2003)... 

Inorganic solar cells based on semiconducting layer architecture can be divided into four main categories including P-N homo junction, hetrojunc-tion either P-I-N or N-I-P and multi junction. 

The multi junction cell to cover range of spectrum. 

One of the problems facing manufacturers of polymer-based photovoltaic cells is their low light-to-energy conversion efficiency of 5% maximum, whereas multi-junction crystalline silicon-cells have achieved a figure of 37%. One of the flexible plastic solar cells exhibiting the 5% efficiency contains zinc oxide. 

Figure 4.86. Schematic of (a) a single-junction and (b) multi-junction photovoltaic ceU. The single-junction cell is reproduced with permission from Kasap, S. O. Principles of Electronic Materials and Devices, 3rd ed., McGraw-Hill New York, 2007. Copyright 2007 The McGraw-Hill Companies.

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