Role of exciton blocking layers in improving efficiency of copper phthalocyanine based organic solar cells

Tripathi, Vibha; Datta, Dilip; Samal, G.S.; Awasthi, Ashish; Kumar, Satyendra

doi:10.1016/j.jnoncrysol.2007.10.098

Cited by 29 publications

(22 citation statements)

References 9 publications

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“…6. Previously reported values [17][18][19][20][21][22] were used for the energy levels in the figures by adjusting to the present work. Energy barrier would exist near the semiconductor/metal interface.…”

Section: Resultsmentioning

confidence: 99%

Formation and Characterization of Bulk Hetero-Junction Solar Cells Using C<SUB>60</SUB> and Perylene

et al. 2008

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Polymer bulk hetero-junction solar cells were fabricated and the electronic and optical properties were investigated. C 60 and perylene were used as n-type semiconductors, and copper phthalocyanine, zinc phthalocyanine and pentacene were used as p-type semiconductors. Energy levels of the molecules were calculated, and HOMO levels were localized around the main chains of the zinc phthalocyanine and pentacene. Nanostructures of the solar cells were confirmed as mixed nanocrystals by transmission electron microscopy and electron diffraction.

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Section: Resultsmentioning

confidence: 99%

Formation and Characterization of Bulk Hetero-Junction Solar Cells Using C<SUB>60</SUB> and Perylene

et al. 2008

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“…Many effective methods have been reported to reduce the hole mobility and improve the balance of holes and electrons in the emitting layer (Troadec et al, 2002;Mori et al, 2008;Kim et al, 2005). 2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline (bathocuproine, BCP) was used in OLED and organic photovoltaic cell because of its multiple role as hole blocking (Adamovich et al, 2003;Kim et al, 2008;Tomova et al, , 2010, exciton-blocking layer Tripathi et al, 2008;Mori & Kato, 2007;Wu et al, 2003), electron transporting and buffer layer , or in combination with NPB in (NPB/BCP) n (n-number of layers) as hole-trapping layer ( Shi et al, 2006). In this work we present our results concerning the role of bathocuproine as hole blocking layer in OLED structure: ITO/HTL/EML/HBL/ETL/M.…”

Section: Bathocuproine As Hole-blocking Layermentioning

confidence: 99%

Organic Light Emitting Diodes Based on Novel Zn and Al Complexes

Petrova¹,

Tomova²,

Stoycheva-Topalova³

2011

Organic Light Emitting Diode - Material, Process and Devices

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“…Among them, amorphous Cu-phthalocyanine (CuPc, C 32 H 16 N 8 Cu) thin film is widely used as an absorption layer or exciton blocking layer in organic photovoltaic cells [4,5] or as a buffer layer in organic light-emitting diodes [6], and hence stands as one of the important organic molecular materials. Thus, the electrical and optical properties of various forms of CuPc films have been intensively investigated.…”

Section: Introductionmentioning

confidence: 99%

Growth behavior of CuPc films by physical vapor deposition

Chiu

Chen

Jan

et al. 2011

Cryst. Res. Technol.

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Various Cu-phthalocyanine (CuPc) films were grown from physical vapor deposition on top of indium-tinoxide glass substrates by controlling substrate temperature (T sub ), source temperature (T sou ), and growth time. From side-view SEM pictures, the growth rates for these CuPc films are estimated and can be categorized into three regions. From the Arrhenius plot of growth rate versus 1/T sub , the activation energy E A can be obtained. As T sou = 390 °C, for region (A) with T sub < 140 °C, the growth of CuPc films is dominated by the adhesion process with E A = 810 meV. For region (B) with 140 °C < T sub < 320 °C, the growth is then limited by the steric character associated with the organic molecular solids with E A = 740 meV. For region (C) with T sub > 320 °C, the re-evaporation of the CuPc adhered molecules from the interface becomes dominant.

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Role of exciton blocking layers in improving efficiency of copper phthalocyanine based organic solar cells

Cited by 29 publications

References 9 publications

Formation and Characterization of Bulk Hetero-Junction Solar Cells Using C<SUB>60</SUB> and Perylene

Formation and Characterization of Bulk Hetero-Junction Solar Cells Using C<SUB>60</SUB> and Perylene

Organic Light Emitting Diodes Based on Novel Zn and Al Complexes

Growth behavior of CuPc films by physical vapor deposition

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