Charge transport and recombination in organic solar cells

被引:0
作者
Street, R. A. [1 ]
机构
[1] Xerox Corp, Palo Alto Res Ctr, Palo Alto, CA 94304 USA
来源
PHYSICAL CHEMISTRY OF INTERFACES AND NANOMATERIALS X | 2011年 / 8098卷
关键词
Organic solar cell; photoconductivity; recombination;
D O I
10.1117/12.892823
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Measurements of transient photoconductivity and the cell spectral response provide information about the carrier mobility, recombination mechanisms and the electronic structure in bulk heterojunction solar cells. The presence of band tail states is deduced from the dispersive transport and from the low energy spectral response, which give a consistent values for the slope of the band tail. An approximate density of states distribution is developed by combining data for the band tails, the band edges and the deep states, based on these results along with other information. Measurements show that geminate recombination is not a dominant recombination process in P3HT:PCBM or PCDTBT: PCBM cells. Instead, it is argued that there is good evidence that recombination through interface traps is important.
引用
收藏
页数:7
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共 10 条
  • [1] Transient photoconductivity in polymer bulk heterojunction solar cells: Competition between sweep-out and recombination
    Cowan, Sarah R.
    Street, R. A.
    Cho, Shinuk
    Heeger, A. J.
    [J]. PHYSICAL REVIEW B, 2011, 83 (03):
  • [2] Charge Transfer State Versus Hot Exciton Dissociation in Polymer-Fullerene Blended Solar Cells
    Lee, Jiye
    Vandewal, Koen
    Yost, Shane R.
    Bahlke, Matthias E.
    Goris, Ludwig
    Baldo, Marc A.
    Manca, Jean V.
    Van Voorhis, Troy
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2010, 132 (34) : 11878 - 11880
  • [3] Bulk heterojunction solar cells with internal quantum efficiency approaching 100%
    Park, Sung Heum
    Roy, Anshuman
    Beaupre, Serge
    Cho, Shinuk
    Coates, Nelson
    Moon, Ji Sun
    Moses, Daniel
    Leclerc, Mario
    Lee, Kwanghee
    Heeger, Alan J.
    [J]. NATURE PHOTONICS, 2009, 3 (05) : 297 - U5
  • [4] ANOMALOUS TRANSIT-TIME DISPERSION IN AMORPHOUS SOLIDS
    SCHER, H
    MONTROLL, EW
    [J]. PHYSICAL REVIEW B, 1975, 12 (06): : 2455 - 2477
  • [5] Photoconductivity measurements of the electronic structure of organic solar cells
    Street, R. A.
    Song, K. W.
    Northrup, J. E.
    Cowan, S.
    [J]. PHYSICAL REVIEW B, 2011, 83 (16):
  • [6] Experimental test for geminate recombination applied to organic solar cells
    Street, R. A.
    Cowan, Sarah
    Heeger, A. J.
    [J]. PHYSICAL REVIEW B, 2010, 82 (12):
  • [7] Interface state recombination in organic solar cells
    Street, R. A.
    Schoendorf, M.
    [J]. PHYSICAL REVIEW B, 2010, 81 (20):
  • [8] STREET RA, PHYS REV B IN PRESS
  • [9] A PHYSICAL INTERPRETATION OF DISPERSIVE TRANSPORT IN DISORDERED SEMICONDUCTORS
    TIEDJE, T
    ROSE, A
    [J]. SOLID STATE COMMUNICATIONS, 1981, 37 (01) : 49 - 52
  • [10] The relation between open-circuit voltage and the onset of photocurrent generation by charge-transfer absorption in polymer: Fullerene bulk heterojunction solar cells
    Vandewal, Koen
    Gadisa, Abay
    Oosterbaan, Wibren D.
    Bertho, Sabine
    Banishoeib, Fateme
    Van Severen, Ineke
    Lutsen, Laurence
    Cleij, Thomas J.
    Vanderzande, Dirk
    Manca, Jean V.
    [J]. ADVANCED FUNCTIONAL MATERIALS, 2008, 18 (14) : 2064 - 2070