Ultrafast Charge Generation Enhancement in Nanoscale Polymer Solar Cells with DIO Additive
We study the ultrafast photoexcitation dynamics in PBDTTT-C-T (P51, poly(4,8-bis(5-(2-ethylhexyl)-thiophene-2-yl)-benzo[1,2-b:4,5-b′]dithiophene-<i>alt</i>-alkylcarbonyl-thieno[3,4-<i>b</i>]thiophene)) film (~100 nm thickness) and PBDTTT-C-T:PC<sub>71</sub>BM (P51...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-10-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/10/11/2174 |
| _version_ | 1827703129227919360 |
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| author | Tongchao Shi Zeyu Zhang Xia Guo Zhengzheng Liu Chunwei Wang Sihao Huang Tingyuan Jia Chenjing Quan Qian Xiong Maojie Zhang Juan Du Yuxin Leng |
| author_facet | Tongchao Shi Zeyu Zhang Xia Guo Zhengzheng Liu Chunwei Wang Sihao Huang Tingyuan Jia Chenjing Quan Qian Xiong Maojie Zhang Juan Du Yuxin Leng |
| author_sort | Tongchao Shi |
| collection | DOAJ |
| description | We study the ultrafast photoexcitation dynamics in PBDTTT-C-T (P51, poly(4,8-bis(5-(2-ethylhexyl)-thiophene-2-yl)-benzo[1,2-b:4,5-b′]dithiophene-<i>alt</i>-alkylcarbonyl-thieno[3,4-<i>b</i>]thiophene)) film (~100 nm thickness) and PBDTTT-C-T:PC<sub>71</sub>BM (P51:PC<sub>71</sub>BM, phenyl-C<sub>71</sub>-butyric-acid-methyl ester) nanostructured blend (∼100 nm thickness) with/without DIO(1,8-diiodooctane) additives with sub-10 fs transient absorption (TA). It is revealed that hot-exciton dissociation and vibrational relaxation could occur in P51 with a lifetime of ~160 fs and was hardly affected by DIO. However, the introduction of DIO in P51 brings a longer lifetime of polaron pairs, which could make a contribution to photocarrier generation. In P51:PC<sub>71</sub>BM nanostructured blends, DIO could promote the Charge Transfer (CT) excitons and free charges generation with a ~5% increasement in ~100 fs. Moreover, the dissociation of CT excitons is faster with DIO, showing a ~5% growth within 1 ps. The promotion of CT excitons and free charge generation by DIO additive is closely related with active layer nanomorphology, accounting for J<sub>sc</sub> enhancement. These results reveal the effect of DIO on carrier generation and separation, providing an effective route to improve the efficiency of nanoscale polymer solar cells. |
| first_indexed | 2024-03-10T15:12:03Z |
| format | Article |
| id | doaj.art-873634c7341349ef8d7f6fa51acd9307 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T15:12:03Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-873634c7341349ef8d7f6fa51acd93072023-11-20T19:15:37ZengMDPI AGNanomaterials2079-49912020-10-011011217410.3390/nano10112174Ultrafast Charge Generation Enhancement in Nanoscale Polymer Solar Cells with DIO AdditiveTongchao Shi0Zeyu Zhang1Xia Guo2Zhengzheng Liu3Chunwei Wang4Sihao Huang5Tingyuan Jia6Chenjing Quan7Qian Xiong8Maojie Zhang9Juan Du10Yuxin Leng11State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, ChinaState Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, ChinaCollege of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, ChinaState Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, ChinaState Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, ChinaState Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, ChinaState Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, ChinaState Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, ChinaState Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, ChinaCollege of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, ChinaState Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, ChinaState Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, ChinaWe study the ultrafast photoexcitation dynamics in PBDTTT-C-T (P51, poly(4,8-bis(5-(2-ethylhexyl)-thiophene-2-yl)-benzo[1,2-b:4,5-b′]dithiophene-<i>alt</i>-alkylcarbonyl-thieno[3,4-<i>b</i>]thiophene)) film (~100 nm thickness) and PBDTTT-C-T:PC<sub>71</sub>BM (P51:PC<sub>71</sub>BM, phenyl-C<sub>71</sub>-butyric-acid-methyl ester) nanostructured blend (∼100 nm thickness) with/without DIO(1,8-diiodooctane) additives with sub-10 fs transient absorption (TA). It is revealed that hot-exciton dissociation and vibrational relaxation could occur in P51 with a lifetime of ~160 fs and was hardly affected by DIO. However, the introduction of DIO in P51 brings a longer lifetime of polaron pairs, which could make a contribution to photocarrier generation. In P51:PC<sub>71</sub>BM nanostructured blends, DIO could promote the Charge Transfer (CT) excitons and free charges generation with a ~5% increasement in ~100 fs. Moreover, the dissociation of CT excitons is faster with DIO, showing a ~5% growth within 1 ps. The promotion of CT excitons and free charge generation by DIO additive is closely related with active layer nanomorphology, accounting for J<sub>sc</sub> enhancement. These results reveal the effect of DIO on carrier generation and separation, providing an effective route to improve the efficiency of nanoscale polymer solar cells.https://www.mdpi.com/2079-4991/10/11/2174nanoscale polymer solar cellsDIO additivetransient absorption spectroscopy |
| spellingShingle | Tongchao Shi Zeyu Zhang Xia Guo Zhengzheng Liu Chunwei Wang Sihao Huang Tingyuan Jia Chenjing Quan Qian Xiong Maojie Zhang Juan Du Yuxin Leng Ultrafast Charge Generation Enhancement in Nanoscale Polymer Solar Cells with DIO Additive Nanomaterials nanoscale polymer solar cells DIO additive transient absorption spectroscopy |
| title | Ultrafast Charge Generation Enhancement in Nanoscale Polymer Solar Cells with DIO Additive |
| title_full | Ultrafast Charge Generation Enhancement in Nanoscale Polymer Solar Cells with DIO Additive |
| title_fullStr | Ultrafast Charge Generation Enhancement in Nanoscale Polymer Solar Cells with DIO Additive |
| title_full_unstemmed | Ultrafast Charge Generation Enhancement in Nanoscale Polymer Solar Cells with DIO Additive |
| title_short | Ultrafast Charge Generation Enhancement in Nanoscale Polymer Solar Cells with DIO Additive |
| title_sort | ultrafast charge generation enhancement in nanoscale polymer solar cells with dio additive |
| topic | nanoscale polymer solar cells DIO additive transient absorption spectroscopy |
| url | https://www.mdpi.com/2079-4991/10/11/2174 |
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