Abstract
The measurements of photocurrent as a function of depletion layer or Schottky barrier width have been performed to determine the exciton diffusion length (L) in microcrystalline chlorophyll a (Chl a). This method of determining L is particularly advantageous in that it does not require a prior knowledge of the absorption coefficient of the material as is usually the case with other, e.g., constant surface photovoltage or constant photocurrent techniques. A value of 180 Å has been obtained for L in Chl a. While this value is comparable to those for many organic semiconductors, it is much inferior to that for the minority carriers in inorganic photoconductors. The smaller diffusion length may, in part, explain the feeble power conversion efficiency of Chl a and other organic photovoltaic cells.
| Original language | English |
|---|---|
| Pages (from-to) | 1823-1825 |
| Number of pages | 3 |
| Journal | Applied Physics Letters |
| Volume | 69 |
| Issue number | 13 |
| State | Published - Sep 23 1996 |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
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Exciton diffusion length in microcrystalline chlorophyll a. / Nasr, Chouhaid; Taleb, Toufik; Leblanc, Roger; Hotchandani, Surat.
In: Applied Physics Letters, Vol. 69, No. 13, 23.09.1996, p. 1823-1825.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Exciton diffusion length in microcrystalline chlorophyll a
AU - Nasr, Chouhaid
AU - Taleb, Toufik
AU - Leblanc, Roger
AU - Hotchandani, Surat
PY - 1996/9/23
Y1 - 1996/9/23
N2 - The measurements of photocurrent as a function of depletion layer or Schottky barrier width have been performed to determine the exciton diffusion length (L) in microcrystalline chlorophyll a (Chl a). This method of determining L is particularly advantageous in that it does not require a prior knowledge of the absorption coefficient of the material as is usually the case with other, e.g., constant surface photovoltage or constant photocurrent techniques. A value of 180 Å has been obtained for L in Chl a. While this value is comparable to those for many organic semiconductors, it is much inferior to that for the minority carriers in inorganic photoconductors. The smaller diffusion length may, in part, explain the feeble power conversion efficiency of Chl a and other organic photovoltaic cells.
AB - The measurements of photocurrent as a function of depletion layer or Schottky barrier width have been performed to determine the exciton diffusion length (L) in microcrystalline chlorophyll a (Chl a). This method of determining L is particularly advantageous in that it does not require a prior knowledge of the absorption coefficient of the material as is usually the case with other, e.g., constant surface photovoltage or constant photocurrent techniques. A value of 180 Å has been obtained for L in Chl a. While this value is comparable to those for many organic semiconductors, it is much inferior to that for the minority carriers in inorganic photoconductors. The smaller diffusion length may, in part, explain the feeble power conversion efficiency of Chl a and other organic photovoltaic cells.
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UR - http://www.scopus.com/inward/citedby.url?scp=0030245093&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0030245093
VL - 69
SP - 1823
EP - 1825
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 13
ER -