Study of interfacial polarization phenomena in organic films by MDC, SHG and surface potential measurement

2005 ◽  
Vol 5 (4) ◽  
pp. 317-320 ◽  
Author(s):  
Mitsumasa Iwamoto ◽  
Takaaki Manaka ◽  
Kei Yoshizaki
Keyword(s):  
Surface Potential ◽  
Interfacial Polarization ◽  
Organic Films ◽  
Potential Measurement ◽  
Polarization Phenomena

Interfacial Energy Alignment at the ITO/Ultra-Thin Electron Selective Dielectric Layer Interface and Its Effect on the Efficiency of Bulk-Heterojunction Organic Solar Cells

2016 ◽  
Vol 16 (4) ◽  
pp. 3248-3253 ◽  
Author(s):  
Eiji Itoh ◽  
Yoshinori Goto ◽  
Yusuke Saka ◽  
Katsutoshi Fukuda
Keyword(s):  
Contact Resistance ◽  
Active Layer ◽  
Surface Potential ◽  
Organic Solar Cells ◽  
Indium Tin Oxide ◽  
Bulk Heterojunction ◽  
Electronic Charge ◽  
Photovoltaic Properties ◽  
Potential Measurement ◽  
Layer Interface

We have investigated the photovoltaic properties of an inverted bulk heterojunction (BHJ) cell in a device with an indium-tin-oxide (ITO)/electron selective layer (ESL)/P3HT:PCBM active layer/MoOx/Ag multilayered structure. The insertion of only single layer of poly(diallyl-dimethylammonium chloride) (PDDA) cationic polymer film (or poly(ethyleneimine) (PEI) polymeric interfacial dipole layer) and titanium oxide nanosheet (TN) films as an ESL effectively improved cell performance. Abnormal S-shaped curves were observed in the inverted BHJ cells owing to the contact resistance across the ITO/active layer interface and the ITO/PDDA/TN/active layer interface. The series resistance across the ITO/ESL interface in the inverted BHJ cell was successfully reduced using an interfacial layer with a positively charged surface potential with respect to ITO base electrode. The positive dipole in PEI and the electronic charge phenomena at the electrophoretic deposited TN (ED-TN) films on ITO contributed to the reduction of the contact resistance at the electrode interface. The surface potential measurement revealed that the energy alignment by the transfer of electronic charges from the ED-TN to the base electrodes. The insertion of the ESL with a large positive surface potential reduced the potential barrier for the electron injection at ITO/TN interface and it improved the photovoltaic properties of the inverted cell with an ITO/TN/active layer/MoOx/Ag structure.

SURFACE POTENTIAL MEASUREMENT OF ELECTRICALLY POLED HAP CERAMICS

Bioceramics ◽  
1999 ◽  
Author(s):  
J. Hamagami ◽  
K. Kanamura ◽  
T. Umegaki ◽  
T. Nakagawa ◽  
Y. Nakano ◽  
...  
Keyword(s):  
Surface Potential ◽  
Potential Measurement
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