Journal article
Detection of trap charge in small molecular organic bulk heterojunction solar cells
- Abstract:
- We detect and measure the trap charges in a small molecular bulk heterojunction solar cell under operating conditions. The trap-charge density is estimated from capacitance measurements with light incident on the sample. At high intensities (∼1 sun, 100 mW/cm2), the trapped charge concentration leads to a spatial distortion of the electric field in the device. The lower limit of the trap-charge density is estimated to be 6 × 1016 cm−3. The frequency dependence of the capacitance suggests that the charges are trapped in a manifold of deep states present in the energy gap of the semiconductors. The distortion of the electric field by this trap charge affects the charge-carrier collection efficiency. © 2010 The American Physical Society.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review B - Condensed Matter and Materials Physics More from this journal
- Volume:
- 82
- Issue:
- 12
- Article number:
- 125204
- Publication date:
- 2010-09-07
- DOI:
- EISSN:
-
1550-235X
- ISSN:
-
1098-0121
- Language:
-
English
- Pubs id:
-
pubs:405394
- UUID:
-
uuid:380d5a23-e944-482c-b22d-e6a21b6dfff4
- Local pid:
-
pubs:405394
- Source identifiers:
-
405394
- Deposit date:
-
2013-09-26
Terms of use
- Copyright holder:
- American Physical Society
- Copyright date:
- 2010
- Notes:
- © 2010 The American Physical Society. The full text of this article is not available in ORA. You may be able to access the article via the publisher copy link above.
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