Analyzing photovoltaic effect of double-layer organic solar cells as a Maxwell-Wagner effect system by optical electric-field-induced second-harmonic generation measurement

2011 ◽  
Vol 110 (10) ◽  
pp. 103717 ◽  
Author(s):  
Dai Taguchi ◽  
Tatsunori Shino ◽  
Xiangyu Chen ◽  
Le Zhang ◽  
Jun Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electric Field ◽  
Second Harmonic Generation ◽  
Double Layer ◽  
Harmonic Generation ◽  
Organic Solar Cells ◽  
Second Harmonic ◽  
Photovoltaic Effect ◽  
Second Harmonic Generation Measurement

Analyzing Open-Voltage of Double-Layer Organic Solar Cells Using Optical Electric-Field-Induced Second-Harmonic Generation

2012 ◽  
Vol 1390 ◽  
Author(s):  
Dai Taguchi ◽  
Xiangyu Chen ◽  
Takaaki Manaka ◽  
Mitsumasa Iwamoto
Keyword(s):  
Solar Cells ◽  
Electric Field ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Organic Solar Cells ◽  
Second Harmonic ◽  
Photovoltaic Effect ◽  
Short Circuit ◽  
Open Circuit ◽  
Electrostatic Energy

ABSTRACTBy using electric-field-induced second-harmonic generation (EFISHG) measurement, we analyzed photovoltaic effect of two-layer solar cells (indium zinc oxide/pentacene/C60/Al). Results evidently showed that negative and excessive charges Qs accumulated at the two-layer interface under illumination, e.g., Qs =-1.7×10-9 C/cm2 at 0.05 mW/cm2 and –3.6×10-9 C/cm2 at 0.5 mW/cm2, while a short-circuit current flowed. The open-circuit voltage changed in accordance with accumulation charge Qs, and finally saturated. Modeling that accumulated negative charge is a source of space charge field and directly effects on the electrostatic energy stored in OSCs, dependence of the open voltage on the accumulated charge Qs was explained.

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