Defect states and their energetic position and distribution in organic molecular semiconductors

Akanksha Sharma, Sarita Yadav, Pramod Kumar, Sumita Ray Chaudhuri, Subhasis Ghosh

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31 Scopus citations

Abstract

Energetic position and distribution of defect states due to structural disorder in pentacene and copper phthalocyanine have been obtained by capacitance based spectroscopic techniques. It has been shown that capacitance-frequency and capacitance-voltage characteristics exhibit Gaussian distribution of traps with an energetic position at around 0.5 eV above the highest occupied molecular orbital level of the pentacene and CuPc. These traps have been created by varying growth conditions and almost identical trap parameters in pentacene and copper phthalocyanine indicate that similar structural disorder is responsible for these traps.

Original languageEnglish
Article number143301
JournalApplied Physics Letters
Volume102
Issue number14
DOIs
StatePublished - 8 Apr 2013
Externally publishedYes

Bibliographical note

Funding Information:
A.S. and S.Y. thank CSIR, India, for the financial support through fellowship. This work was partly supported by DST, Government of India.

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