Details

Autor(en) / Beteiligte

• Panthani, Matthew G
• Kurley, J. Matthew
• Crisp, Ryan W
• Dietz, Travis C
• Ezzyat, Taha
• Luther, Joseph M
• Talapin, Dmitri V

Titel

High Efficiency Solution Processed Sintered CdTe Nanocrystal Solar Cells: The Role of Interfaces

Ist Teil von

• Nano letters, 2014-02, Vol.14 (2), p.670-675

Ort / Verlag

Washington, DC: American Chemical Society

Erscheinungsjahr

2014

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Solution processing of photovoltaic semiconducting layers offers the potential for drastic cost reduction through improved materials utilization and high device throughput. One compelling solution-based processing strategy utilizes semiconductor layers produced by sintering nanocrystals into large-grain semiconductors at relatively low temperatures. Using n-ZnO/p-CdTe as a model system, we fabricate sintered CdTe nanocrystal solar cells processed at 350 °C with power conversion efficiencies (PCE) as high as 12.3%. J SC of over 25 mA cm–2 are achieved, which are comparable or higher than those achieved using traditional, close-space sublimated CdTe. We find that the V OC can be substantially increased by applying forward bias for short periods of time. Capacitance measurements as well as intensity- and temperature-dependent analysis indicate that the increased V OC is likely due to relaxation of an energetic barrier at the ITO/CdTe interface.