Carrier motion in as-spun and annealed P3HT:PCBM blends revealed by ultrafast optical electric field probing and Monte Carlo simulations
Charge transport dynamics in solar cell devices based on as-spun and annealed P3HT:PCBM films are compared using ultrafast time-resolved optical probing of the electric field by means of field-induced second harmonic generation. The results show that charge carriers drift about twice as far during t...
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| Veröffentlicht in: | Physical chemistry chemical physics : PCCP 2014-01, Vol.16 (6), p.2686-2692 |
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| creator | Abramavi ius, Vytautas Amarasinghe Vithanage, Dimali Devi is, Andrius Infahsaeng, Yingyot Bruno, Annalisa Foster, Samuel Keivanidis, Panagiotis E Abramavi ius, Darius Nelson, Jenny Yartsev, Arkady Sundström, Villy Gulbinas, Vidmantas |
| description | Charge transport dynamics in solar cell devices based on as-spun and annealed P3HT:PCBM films are compared using ultrafast time-resolved optical probing of the electric field by means of field-induced second harmonic generation. The results show that charge carriers drift about twice as far during the first 3 ns after photogeneration in a device where the active layer has been thermally annealed. The carrier dynamics were modelled using Monte-Carlo simulations and good agreement between experimental and simulated drift dynamics was obtained using identical model parameters for both cells, but with different average PCBM and polymer domain sizes. The calculations suggest that small domain sizes in as-spun samples limit the carrier separation distance disabling their escape from geminate recombination.
Domain sizes limiting distances of unrestricted carrier motion determine their separation efficiencies. |
| doi_str_mv | 10.1039/c3cp54605e |
| format | Article |
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Domain sizes limiting distances of unrestricted carrier motion determine their separation efficiencies.</description><subject>Annealing</subject><subject>Atom and Molecular Physics and Optics</subject><subject>Atom- och molekylfysik och optik</subject><subject>Fysik</subject><subject>Natural Sciences</subject><subject>Naturvetenskap</subject><subject>Physical Sciences</subject><issn>1463-9076</issn><issn>1463-9084</issn><issn>1463-9084</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqFkUtv1TAQhSMEoqWwYQ8yO4QUsDOOH93BFVCkW9FFWVuOPUFGzgM7AfUf8LPxJeUiNrA4npHn0xlbp6oeM_qSUdCvHLi55YK2eKc6ZVxAranid4-9FCfVg5y_UEpZy-B-ddJwUFw1-rT6sbMpBUxkmJYwjSSMxOY6z2upoy8a0Ub05Aours-vdm8uSRdx9Jkk_LZNuhuyxiXZ3uaFTPMSnI0EI7olBUf6gNGTOU1dGD__srycxgVJWRsnksOwRntYnB9W93obMz66rWfVp3dvr3cX9f7j-w-71_vaccmXGlWraNO0SLGVylvuhWJNb8uFgh5oZzlDCU6KpgNXDs4lMNTMI1jJAc6q_eabv-O8dmZOYbDpxkw2mLjORV2RyWiY5MJ3WhkhQBmO0hvdNsIAaKG5klzqptg93-zKF7-umBczhOwwRjvitGbDWipAUs3b_6O8RCU11Qf0xYa6NOWcsD8-k1FzyNz8ybzAT299125Af0R_h1yAJxuQsjtO_zJ49q-5mX0PPwH3r7sk</recordid><startdate>20140101</startdate><enddate>20140101</enddate><creator>Abramavi ius, Vytautas</creator><creator>Amarasinghe Vithanage, Dimali</creator><creator>Devi is, Andrius</creator><creator>Infahsaeng, Yingyot</creator><creator>Bruno, Annalisa</creator><creator>Foster, Samuel</creator><creator>Keivanidis, Panagiotis E</creator><creator>Abramavi ius, Darius</creator><creator>Nelson, Jenny</creator><creator>Yartsev, Arkady</creator><creator>Sundström, Villy</creator><creator>Gulbinas, Vidmantas</creator><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope><scope>ADTPV</scope><scope>AOWAS</scope><scope>D95</scope></search><sort><creationdate>20140101</creationdate><title>Carrier motion in as-spun and annealed P3HT:PCBM blends revealed by ultrafast optical electric field probing and Monte Carlo simulations</title><author>Abramavi ius, Vytautas ; 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The results show that charge carriers drift about twice as far during the first 3 ns after photogeneration in a device where the active layer has been thermally annealed. The carrier dynamics were modelled using Monte-Carlo simulations and good agreement between experimental and simulated drift dynamics was obtained using identical model parameters for both cells, but with different average PCBM and polymer domain sizes. The calculations suggest that small domain sizes in as-spun samples limit the carrier separation distance disabling their escape from geminate recombination.
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| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Annealing Atom and Molecular Physics and Optics Atom- och molekylfysik och optik Fysik Natural Sciences Naturvetenskap Physical Sciences |
| title | Carrier motion in as-spun and annealed P3HT:PCBM blends revealed by ultrafast optical electric field probing and Monte Carlo simulations |
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