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Volumn 112, Issue 51, 2008, Pages 20505-20509

Electron transport and recombination in dye-sensitized TiO2 solar cells fabricated without sintering process

Author keywords

[No Author keywords available]

Indexed keywords

CARRIER CONCENTRATION; DIGITAL CAMERAS; ELECTRON DENSITY MEASUREMENT; GRAIN BOUNDARIES; GRAIN GROWTH; PHOTOVOLTAIC CELLS; SINTERING; SOLAR CELLS; SUSPENSIONS (FLUIDS); VOLATILE ORGANIC COMPOUNDS;

EID: 61349202822     PISSN: 19327447     EISSN: 19327455     Source Type: Journal    
DOI: 10.1021/jp8065629     Document Type: Article
Times cited : (31)

References (40)
  • 13
    • 0034905360 scopus 로고    scopus 로고
    • Nelson, J.; Haque, S. A.; Klug, D. R.; Durrant, J. R. Phys. Rev. B 2001, 63, 2053211.
    • Nelson, J.; Haque, S. A.; Klug, D. R.; Durrant, J. R. Phys. Rev. B 2001, 63, 2053211.
  • 23
    • 61349187736 scopus 로고    scopus 로고
    • When the traps are located on the surface, the traps could act as a recombination center. Light intensity dependent electron lifetime in DSCs can be also explained by dealing the traps as a recombination center (see ref 14, The model predicts that when the trap density increases, both electron diffusion coefficients and electron lifetime in the DSCs increase. However there are several experimental results which are inconsistent with the prediction e.g, ref 16
    • When the traps are located on the surface, the traps could act as a recombination center. Light intensity dependent electron lifetime in DSCs can be also explained by dealing the traps as a recombination center (see ref 14). The model predicts that when the trap density increases, both electron diffusion coefficients and electron lifetime in the DSCs increase. However there are several experimental results which are inconsistent with the prediction (e.g., ref 16).
  • 32
    • 61349185825 scopus 로고    scopus 로고
    • The FF of the nonsintered DSCs showed slightly higher values than that of sintered DSCs, although the electron diffusion coefficients in the nonsintered DSCs gave lower values. The value of FF is related with internal electrical resistance. Thus, one might expect lower FF from nonsintered DSCs. On the other hand, the current of the DSCs is determined mostly by diffusion current, that is, low diffusion coefficients can be compensated by the increased charge density. This probably explains that the FF is less sensitive to the electrical resistance of the TiO2 films
    • 2 films.
  • 33
    • 61349195904 scopus 로고    scopus 로고
    • The value of Jsc for the cell prepared with 450 °C heating process with E50 seems to be reduced from the cells with E25 and E15. This was due to the sample variations. In the Supporting Information, we showed values for two samples prepared at the same time for each condition (Table S1, Another concern would be that the value of Jsc could be reduced due to the absorption of I-3. In order to check the effect, we prepared DSCs again with 450 °C heating process with E50, E25, and E15, and measured I-V curves and incident-photon to current-conversion efficiency (IPCE, We observed the decrease of IPCE at less than 500 nm. However, the influence on the values of Jsc was a few percent Supporting Information, Figure S1
    • sc was a few percent (Supporting Information, Figure S1).
  • 34
    • 61349104444 scopus 로고    scopus 로고
    • The influence of annealing temperature on the amount of dye adsorption was measured, and the difference was 11% between the films having 450 and 80 °C heating processes.
    • The influence of annealing temperature on the amount of dye adsorption was measured, and the difference was 11% between the films having 450 and 80 °C heating processes.
  • 35
    • 61349146587 scopus 로고    scopus 로고
    • From the values of D and τ in Figure 1, estimated diffusion length for sintered DSCs with E50 was more than 20 μm.
    • From the values of D and τ in Figure 1, estimated diffusion length for sintered DSCs with E50 was more than 20 μm.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.