Quantifying charge carrier density in organic solar cells by differential charging techniques
Accurate determination of charge carrier density in organic solar cells under light irradiation is essential because charge carrier density is directly related to the bimolecular recombination rate and open-circuit voltage of the cells. We investigate the robustness of transient photovoltage/current...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2019-12-01
|
| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.5122709 |
| _version_ | 1818068057134727168 |
|---|---|
| author | Kyohei Nakano Yujiao Chen Keisuke Tajima |
| author_facet | Kyohei Nakano Yujiao Chen Keisuke Tajima |
| author_sort | Kyohei Nakano |
| collection | DOAJ |
| description | Accurate determination of charge carrier density in organic solar cells under light irradiation is essential because charge carrier density is directly related to the bimolecular recombination rate and open-circuit voltage of the cells. We investigate the robustness of transient photovoltage/current (TPV/C) and impedance spectroscopy (IS) to interference from the geometric capacitance of the cells (Cgeo) during quantification of the charge carrier density. TPV/C and IS accurately quantify the charge carrier density of bulk heterojunction cells with small Cgeo. For planar heterojunction cells with a larger Cgeo contribution, IS fails to separate the charge carriers in the organic layer from those in the electrodes. In contrast, TPV/C eliminates the effect of Cgeo and gives a reasonable estimation of the charge carrier density in the organic layer with the planar heterojunction, demonstrating that TPV/C is more robust than IS to interference from Cgeo of the cells. |
| first_indexed | 2024-12-10T15:33:31Z |
| format | Article |
| id | doaj.art-2ac30d3b589c4371a2f2bc7d5ff080f8 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-10T15:33:31Z |
| publishDate | 2019-12-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-2ac30d3b589c4371a2f2bc7d5ff080f82022-12-22T01:43:18ZengAIP Publishing LLCAIP Advances2158-32262019-12-01912125205125205-510.1063/1.5122709Quantifying charge carrier density in organic solar cells by differential charging techniquesKyohei Nakano0Yujiao Chen1Keisuke Tajima2RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, JapanRIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, JapanRIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, JapanAccurate determination of charge carrier density in organic solar cells under light irradiation is essential because charge carrier density is directly related to the bimolecular recombination rate and open-circuit voltage of the cells. We investigate the robustness of transient photovoltage/current (TPV/C) and impedance spectroscopy (IS) to interference from the geometric capacitance of the cells (Cgeo) during quantification of the charge carrier density. TPV/C and IS accurately quantify the charge carrier density of bulk heterojunction cells with small Cgeo. For planar heterojunction cells with a larger Cgeo contribution, IS fails to separate the charge carriers in the organic layer from those in the electrodes. In contrast, TPV/C eliminates the effect of Cgeo and gives a reasonable estimation of the charge carrier density in the organic layer with the planar heterojunction, demonstrating that TPV/C is more robust than IS to interference from Cgeo of the cells.http://dx.doi.org/10.1063/1.5122709 |
| spellingShingle | Kyohei Nakano Yujiao Chen Keisuke Tajima Quantifying charge carrier density in organic solar cells by differential charging techniques AIP Advances |
| title | Quantifying charge carrier density in organic solar cells by differential charging techniques |
| title_full | Quantifying charge carrier density in organic solar cells by differential charging techniques |
| title_fullStr | Quantifying charge carrier density in organic solar cells by differential charging techniques |
| title_full_unstemmed | Quantifying charge carrier density in organic solar cells by differential charging techniques |
| title_short | Quantifying charge carrier density in organic solar cells by differential charging techniques |
| title_sort | quantifying charge carrier density in organic solar cells by differential charging techniques |
| url | http://dx.doi.org/10.1063/1.5122709 |
| work_keys_str_mv | AT kyoheinakano quantifyingchargecarrierdensityinorganicsolarcellsbydifferentialchargingtechniques AT yujiaochen quantifyingchargecarrierdensityinorganicsolarcellsbydifferentialchargingtechniques AT keisuketajima quantifyingchargecarrierdensityinorganicsolarcellsbydifferentialchargingtechniques |