Hole-transport barrier and band bending at the indium tin oxide/polymer/p-AlGaN interface

2006 ◽  
Vol 89 (15) ◽  
pp. 152121 ◽  
Author(s):  
Yow-Jon Lin
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Hole Transport ◽  
Transport Barrier ◽  
Band Bending

Evidence of nitric-oxide-induced surface band bending of indium tin oxide

2004 ◽  
Vol 95 (11) ◽  
pp. 6273-6276 ◽  
Author(s):  
Jianqiao Hu ◽  
Jisheng Pan ◽  
Furong Zhu ◽  
Hao Gong
Keyword(s):  
Nitric Oxide ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Surface Band ◽  
Band Bending

Surface Electronic Structure of Nitric-oxide-treated Indium Tin Oxide

2003 ◽  
Vol 796 ◽  
Author(s):  
Hu Jianqiao ◽  
Pan Jisheng ◽  
Furong Zhu ◽  
Gong Hao
Keyword(s):  
Nitric Oxide ◽  
Binding Energy ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Photoelectron Spectroscopy ◽  
Surface Region ◽  
Valence Band Maximum ◽  
Surface Band ◽  
Band Bending ◽  
Surface Electronic Structure

ABSTRACTThe surface electronic properties of the nitric oxide (NO) treated indium tin oxide (ITO) are examined in-situ by a four-point probe and X-ray photoelectron spectroscopy (XPS). The XPS N1s peak emerged at a high binding energy of 404 eV indicating that NO is reactive with ITO. NO adsorption induces an increase of film sheet resistance, arising from an oxygen rich layer near the ITO surface region, with approximately 2.5 nm thick. This implies that the interaction of NO with ITO is occurred around surface region. Valence band maximum measured for NO-absorbed ITO was shifted to the low binding energy side. This is related to the upward surface band bending.

scholarly journals Low-temperature synthesis of carbon nanotubes on indium tin oxide electrodes for organic solar cells

2012 ◽  
Vol 3 ◽  
pp. 524-532 ◽  
Author(s):  
Andrea Capasso ◽  
Luigi Salamandra ◽  
Aldo Di Carlo ◽  
John Marcus Bell ◽  
Nunzio Motta
Keyword(s):  
Carbon Nanotubes ◽  
Solar Cells ◽  
Tin Oxide ◽  
Organic Solar Cells ◽  
Indium Tin Oxide ◽  
Gas Flow ◽  
Acid Methyl Ester ◽  
Hole Transport ◽  
Electrical Performance ◽  
Oxide Electrodes

The electrical performance of indium tin oxide (ITO) coated glass was improved by including a controlled layer of carbon nanotubes directly on top of the ITO film. Multiwall carbon nanotubes (MWCNTs) were synthesized by chemical vapor deposition, using ultrathin Fe layers as catalyst. The process parameters (temperature, gas flow and duration) were carefully refined to obtain the appropriate size and density of MWCNTs with a minimum decrease of the light harvesting in the cell. When used as anodes for organic solar cells based on poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM), the MWCNT-enhanced electrodes are found to improve the charge-carrier extraction from the photoactive blend, thanks to the additional percolation paths provided by the CNTs. The work function of as-modified ITO surfaces was measured by the Kelvin probe method to be 4.95 eV, resulting in an improved matching to the highest occupied molecular orbital level of the P3HT. This is in turn expected to increase the hole transport and collection at the anode, contributing to the significant increase of current density and open-circuit voltage observed in test cells created with such MWCNT-enhanced electrodes.

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