Charge generation in organic solar cells: Journey toward 20% power conversion efficiency
Abstract The power conversion efficiencies of organic solar cells (OSCs) have routinely lagged far behind those of their inorganic counterparts. However, owing to the enormous contributions of many researchers, the power conversion efficiencies of OSCs have rapidly improved and now exceed 19%. The c...
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| Format: | Article |
| Language: | English |
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Wiley
2022-12-01
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| Series: | Aggregate |
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| Online Access: | https://doi.org/10.1002/agt2.280 |
| _version_ | 1828085987551477760 |
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| author | Yasunari Tamai |
| author_facet | Yasunari Tamai |
| author_sort | Yasunari Tamai |
| collection | DOAJ |
| description | Abstract The power conversion efficiencies of organic solar cells (OSCs) have routinely lagged far behind those of their inorganic counterparts. However, owing to the enormous contributions of many researchers, the power conversion efficiencies of OSCs have rapidly improved and now exceed 19%. The charge generation mechanisms in OSCs have been heavily debated during this period while acquiring valuable knowledge. This review highlights fundamental and cutting‐edge research that rationalizes why OSCs can generate photocurrent so efficiently. In particular, a photophysicist's views on exciton diffusion to donor:acceptor interfaces, charge transfer at the donor:acceptor interface, and long‐range spatial dissociation of charge transfer states are discussed. Although a general consensus in this area has not been reached yet, recent time‐resolved spectroscopic measurements provide important photophysical insights that can help achieving a better understanding of the charge generation mechanism in OSCs. Based on these observations, future research directions for realizing further improvements in OSC performance are discussed. |
| first_indexed | 2024-04-11T04:47:32Z |
| format | Article |
| id | doaj.art-36ea7ad89eb94145a313c1715181027d |
| institution | Directory Open Access Journal |
| issn | 2692-4560 |
| language | English |
| last_indexed | 2024-04-11T04:47:32Z |
| publishDate | 2022-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Aggregate |
| spelling | doaj.art-36ea7ad89eb94145a313c1715181027d2022-12-27T06:37:38ZengWileyAggregate2692-45602022-12-0136n/an/a10.1002/agt2.280Charge generation in organic solar cells: Journey toward 20% power conversion efficiencyYasunari Tamai0Department of Polymer Chemistry Graduate School of Engineering Kyoto University Katsura Nishikyo Kyoto JapanAbstract The power conversion efficiencies of organic solar cells (OSCs) have routinely lagged far behind those of their inorganic counterparts. However, owing to the enormous contributions of many researchers, the power conversion efficiencies of OSCs have rapidly improved and now exceed 19%. The charge generation mechanisms in OSCs have been heavily debated during this period while acquiring valuable knowledge. This review highlights fundamental and cutting‐edge research that rationalizes why OSCs can generate photocurrent so efficiently. In particular, a photophysicist's views on exciton diffusion to donor:acceptor interfaces, charge transfer at the donor:acceptor interface, and long‐range spatial dissociation of charge transfer states are discussed. Although a general consensus in this area has not been reached yet, recent time‐resolved spectroscopic measurements provide important photophysical insights that can help achieving a better understanding of the charge generation mechanism in OSCs. Based on these observations, future research directions for realizing further improvements in OSC performance are discussed.https://doi.org/10.1002/agt2.280charge dissociationcharge recombinationcharge separationcharge transferexciton diffusionorganic photovoltaics |
| spellingShingle | Yasunari Tamai Charge generation in organic solar cells: Journey toward 20% power conversion efficiency Aggregate charge dissociation charge recombination charge separation charge transfer exciton diffusion organic photovoltaics |
| title | Charge generation in organic solar cells: Journey toward 20% power conversion efficiency |
| title_full | Charge generation in organic solar cells: Journey toward 20% power conversion efficiency |
| title_fullStr | Charge generation in organic solar cells: Journey toward 20% power conversion efficiency |
| title_full_unstemmed | Charge generation in organic solar cells: Journey toward 20% power conversion efficiency |
| title_short | Charge generation in organic solar cells: Journey toward 20% power conversion efficiency |
| title_sort | charge generation in organic solar cells journey toward 20 power conversion efficiency |
| topic | charge dissociation charge recombination charge separation charge transfer exciton diffusion organic photovoltaics |
| url | https://doi.org/10.1002/agt2.280 |
| work_keys_str_mv | AT yasunaritamai chargegenerationinorganicsolarcellsjourneytoward20powerconversionefficiency |