Room-temperature bulk photovoltaic effect in a terthiophene-based ferroelectric liquid crystal bearing dilactate side chains
Room-temperature bulk photovoltaic effect of a ferroelectric liquid crystal based on diphenylterthiophene bearing dilactate side chains is provided in this study. In the polarized smectic phase of this compound, the improved bulk photovoltaic effect was observed without electron acceptors, indicatin...
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Taylor & Francis Group
2025-12-01
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| Series: | Science and Technology of Advanced Materials |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/14686996.2025.2525058 |
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| author | Masahiro Funahashi Yasuko Koshiba Shohei Horike Shinobu Uemura |
| author_facet | Masahiro Funahashi Yasuko Koshiba Shohei Horike Shinobu Uemura |
| author_sort | Masahiro Funahashi |
| collection | DOAJ |
| description | Room-temperature bulk photovoltaic effect of a ferroelectric liquid crystal based on diphenylterthiophene bearing dilactate side chains is provided in this study. In the polarized smectic phase of this compound, the improved bulk photovoltaic effect was observed without electron acceptors, indicating the open-circuit voltage of 1.1 V. A time-of-flight measurement revealed that the hole and electron mobilities were retained to be over 1 × 10−3 cm2V−1s−1 at room temperature. Dielectric relaxation spectra exhibited that the relaxation of dipolar fluctuation shifted from 105 Hz to 104 Hz in the polarized smectic phase, indicating suppression of thermal motion of the polar side chains. By doping a fullerene derivative as an electron acceptor, the performance of the bulk photovoltaic effect was also enhanced at room temperature, indicating the power conversion efficiency of 0.24 %. The double chiral structure of the dilactate side chain should restrict the conformation of the carbonyl groups in the side chains to enhance packing of the π-conjugated units and to stabilize the polarized structure of the smectic phase. |
| format | Article |
| id | doaj-art-905199f7b84049129cfeff9913142bc1 |
| institution | DOAJ |
| issn | 1468-6996 1878-5514 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Science and Technology of Advanced Materials |
| spelling | doaj-art-905199f7b84049129cfeff9913142bc12025-08-20T02:47:10ZengTaylor & Francis GroupScience and Technology of Advanced Materials1468-69961878-55142025-12-0126110.1080/14686996.2025.2525058Room-temperature bulk photovoltaic effect in a terthiophene-based ferroelectric liquid crystal bearing dilactate side chainsMasahiro Funahashi0Yasuko Koshiba1Shohei Horike2Shinobu Uemura3Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Kobe, JapanDepartment of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Kobe, JapanDepartment of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Kobe, JapanHealth and Medical Research Institute, National Institute of Advanced Industrial Science and Technology, Takamatsu, JapanRoom-temperature bulk photovoltaic effect of a ferroelectric liquid crystal based on diphenylterthiophene bearing dilactate side chains is provided in this study. In the polarized smectic phase of this compound, the improved bulk photovoltaic effect was observed without electron acceptors, indicating the open-circuit voltage of 1.1 V. A time-of-flight measurement revealed that the hole and electron mobilities were retained to be over 1 × 10−3 cm2V−1s−1 at room temperature. Dielectric relaxation spectra exhibited that the relaxation of dipolar fluctuation shifted from 105 Hz to 104 Hz in the polarized smectic phase, indicating suppression of thermal motion of the polar side chains. By doping a fullerene derivative as an electron acceptor, the performance of the bulk photovoltaic effect was also enhanced at room temperature, indicating the power conversion efficiency of 0.24 %. The double chiral structure of the dilactate side chain should restrict the conformation of the carbonyl groups in the side chains to enhance packing of the π-conjugated units and to stabilize the polarized structure of the smectic phase.https://www.tandfonline.com/doi/10.1080/14686996.2025.2525058Bulk photovoltaic effectferroelectricliquid crystalline semiconductoroligothiophenelactateferroelectric liquid crystal |
| spellingShingle | Masahiro Funahashi Yasuko Koshiba Shohei Horike Shinobu Uemura Room-temperature bulk photovoltaic effect in a terthiophene-based ferroelectric liquid crystal bearing dilactate side chains Science and Technology of Advanced Materials Bulk photovoltaic effect ferroelectric liquid crystalline semiconductor oligothiophene lactate ferroelectric liquid crystal |
| title | Room-temperature bulk photovoltaic effect in a terthiophene-based ferroelectric liquid crystal bearing dilactate side chains |
| title_full | Room-temperature bulk photovoltaic effect in a terthiophene-based ferroelectric liquid crystal bearing dilactate side chains |
| title_fullStr | Room-temperature bulk photovoltaic effect in a terthiophene-based ferroelectric liquid crystal bearing dilactate side chains |
| title_full_unstemmed | Room-temperature bulk photovoltaic effect in a terthiophene-based ferroelectric liquid crystal bearing dilactate side chains |
| title_short | Room-temperature bulk photovoltaic effect in a terthiophene-based ferroelectric liquid crystal bearing dilactate side chains |
| title_sort | room temperature bulk photovoltaic effect in a terthiophene based ferroelectric liquid crystal bearing dilactate side chains |
| topic | Bulk photovoltaic effect ferroelectric liquid crystalline semiconductor oligothiophene lactate ferroelectric liquid crystal |
| url | https://www.tandfonline.com/doi/10.1080/14686996.2025.2525058 |
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