TITLE

Measurement of the valence-band discontinuities for molecular organic semiconductor/inorganic semiconductor heterojunctions

AUTHOR(S)
So, F. F.; Forrest, S. R.
PUB. DATE
April 1988
SOURCE
Applied Physics Letters;4/18/1988, Vol. 52 Issue 16, p1341
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Using the temperature dependence of the forward-biased current-voltage characteristics as well as internal photoemission, we directly measure the barrier potential and valence-band discontinuity energy (ΔEv ) of isotype heterojunctions formed between thin films of the crystalline organic semiconductor: 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) and p-Si. We find ΔEv =(0.50±0.02) eV. This, to our knowledge, is the first report of a measurement of a band discontinuity energy between a crystalline organic semiconductor and an inorganic semiconductor. These results are consistent with predictions of a current model involving diffusion and drift in the organic-on-inorganic (OI) semiconductor device. This model is employed to calculate ΔEv using previously obtained barrier energies for several different PTCDA/inorganic semiconductor devices. In all cases, values of the barrier diffusion potential and ΔEv are considerably smaller than apparent barrier energies obtained previously using pure thermionic emission theory to explain transport of charge over the OI barrier.
ACCESSION #
9826551

 

Related Articles

  • Fabrication and Characterization of Al/Methyl Orange/n-Si Heterojunction Diode. Tahir, Muhammad; Sayyad, Muhammad H.; Khan, Dil N.; Wahab, Fazal // World Academy of Science, Engineering & Technology;2012, Issue 61, p1052 

    Herein, the organic semiconductor methyl orange (MO), is investigated for the first time for its electronic applications. For this purpose, Al/MO/n-Si heterojunction is fabricated through economical cheap and simple "drop casting" technique. The currentvoltage (I-V) measurements of the device...

  • Application of poly(3,4-ethylenedioxythiophene):polystyrenesulfonate in polymer heterojunction solar cells. Li, Yan; Yue, Gentian; Chen, Xiaoxu; He, Benlin; Chu, Lei; Chen, Haiyan; Wu, Jihuai; Tang, Qunwei // Journal of Materials Science;May2013, Vol. 48 Issue 9, p3528 

    In this study, p-type semiconducting polymer of acid, poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS), has been employed as a hole-transporting electrode to fabricate organic polymer heterojunction photovoltaic cells. The results showed that the resultant...

  • Bulk heterojunction organic photovoltaic devices based on phenyl-cored thiophene dendrimers. Kopidakis, Nikos; Mitchell, William J.; van de Lagemaat, Jao; Ginley, David S.; Rumbles, Garry; Shaheen, Sean E.; Rance, William L. // Applied Physics Letters;9/4/2006, Vol. 89 Issue 10, p103524 

    Bulk heterojunction organic photovoltaic devices have been fabricated by blending phenyl-cored thiophene dendrimers with a fullerene derivative. A power conversion efficiency of 1.3% under simulated AM1.5 illumination is obtained for a four-arm dendrimer, despite its large optical band gap of...

  • Organic diodes as monolithically integrated surface plasmon polariton detectors. Ditlbacher, H.; Aussenegg, F. R.; Krenn, J. R.; Lamprecht, B.; Jakopic, G.; Leising, G. // Applied Physics Letters;10/16/2006, Vol. 89 Issue 16, p161101 

    The authors show that organic p/n heterojunction diodes enable the direct electric detection of surface plasmon polaritons (SPPs). The organic diodes are built from two organic semiconductor thin film layers with an area of 150×500 μm2 deposited on an extended silver thin film. Besides...

  • Kinetics of interfacial charges in hybrid GaAs/oligothiophene semiconducting heterojunctions. Cabanillas-Gonzalez, Juan; Gambetta, Alessio; Zavelani-Rossi, Margherita; Lanzani, Guglielmo // Applied Physics Letters;9/17/2007, Vol. 91 Issue 12, p122113 

    The authors report on pump-probe measurements in a hybrid heterostructure consisting of a modified oligothiophene layer deposited over a GaAs substrate. Upon photoexcitation of the bilayer with 100 fs, a new photoinduced absorption band (PA2) appeared being attributed to oligothiophene cations...

  • Design of efficient organic tandem cells: On the interplay between molecular absorption and layer sequence. Dennler, Gilles; Forberich, Karen; Ameri, Tayebeh; Waldauf, Christoph; Denk, Patrick; Brabec, Christoph J.; Hingerl, Kurt; Heeger, Alan J. // Journal of Applied Physics;Dec2007, Vol. 102 Issue 12, p123109 

    We have carried out detailed optical simulations of tandem solar cells based on the following organic semiconductors: poly(3-hexylthiophene) (P3HT), poly[2,6-(4,4-bis-(2-ethylhexyl)-4H- cyclopenta[2,1-b;3,4-b′]dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT), 1-(3- methoxycarbonyl)...

  • Ordered bulk heterojunction solar cells with vertically aligned TiO2 nanorods embedded in a conjugated polymer. Kuo, C. Y.; Tang, W. C.; Gau, C.; Guo, T. F.; Jeng, D. Z. // Applied Physics Letters;7/21/2008, Vol. 93 Issue 3, p033307 

    Vertically aligned TiO2 nanorods were prepared by its sol-gel which is spun coat onto aluminum anodic oxide template pregrown on an indium tin oxide glass substrate. The poly(3-hexylthiophene) (P3HT), a conjugate polymer infiltrated into the nanorod arrays, and the combined system were used as...

  • High power efficiency tandem organic light-emitting diodes based on bulk heterojunction organic bipolar charge generation layer. Yonghua Chen; Jiangshan Chen; Dongge Ma; Donghang Yan; Lixiang Wang; Furong Zhu // Applied Physics Letters;6/13/2011, Vol. 98 Issue 24, p243309 

    The significant enhancement in power efficiency of tandem organic light-emitting diodes (OLEDs) was achieved using bulk heterojunction organic bipolar charge generation layer (CGL), consisted of zinc phthalocyanine (ZnPc): fullerene (C60) blend. In addition to a significant enhancement in...

  • Charge depletion in organic heterojunction. Ng, T. W.; Lo, M. F.; Lee, S. T.; Lee, C. S. // Applied Physics Letters;3/12/2012, Vol. 100 Issue 11, p113301 

    Until now two types of organic-organic heterojunction (OHJ) have been observed in P-N junctions formed between undoped-organic semiconductors. Charge-transfers across OHJs are either negligible or showing electron transfer from P-type to N-type materials, leading to charges accumulation near the...

Share

Read the Article

Courtesy of NEW JERSEY STATE LIBRARY

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics