Details

Autor(en) / Beteiligte

• Wheeldon, J.F.
• Valdivia, C.E.
• Walker, A.
• Kolhatkar, G.
• Hall, T.J.
• Hinzer, K.
• Masson, D.
• Fafard, S.
• Jaouad, A.
• Turala, A.
• Ares, R.
• Aimez, V.

Titel

AlGaAs tunnel junction for high efficiency multi-junction solar cells: Simulation and measurement of temperature-dependent operation

Ist Teil von

• 2009 34th IEEE Photovoltaic Specialists Conference (PVSC), 2009, p.000106-000111

Ort / Verlag

IEEE

Erscheinungsjahr

2009

Quelle

IEEE Electronic Library (IEL)

Beschreibungen/Notizen

• AlGaAs tunnel junctions are shown to be well-suited to concentrated photovoltaics where temperatures and current densities can be dramatically higher than for 1-sun flat-panel systems. Detailed comparisons of AlGaAs/AlGaAs tunnel junction experimental measurements over a range of temperatures expected during device operation in concentrator systems are presented. Experimental and simulation results are compared in an effort to decouple the tunnel junction from the overall multi-junction solar cell. The tunnel junction resistance is experimentally studied as a function of the temperature to determine its contribution to overall efficiency of the solar cell. The current-voltage behavior of the isolated TJ shows that as the temperature is increased from 25°C to 85°C, the resistance decreases from ~4.7×10 -4 ¿·cm 2 to ~0.3×10 -4 ¿·cm 2 for the operational range of a multi-junction solar cell under concentration.