Synthesis, structure, and opto-electronic properties of organic-based nanoscale heterojunctions
<p>Abstract</p> <p>Enormous research effort has been put into optimizing organic-based opto-electronic systems for efficient generation of free charge carriers. This optimization is mainly due to typically high dissociation energy (0.1-1 eV) and short diffusion length (10 nm) of ex...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2011-01-01
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| Series: | Nanoscale Research Letters |
| Online Access: | http://www.nanoscalereslett.com/content/6/1/238 |
| _version_ | 1797762159021654016 |
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| author | Cimrová Vĕra Rezek Bohuslav Čermák Jan Kromka Alexander Ledinský Martin Hubík Pavel Mareš Jiří Purkrt Adam Fejfar Antonín Kočka Jan |
| author_facet | Cimrová Vĕra Rezek Bohuslav Čermák Jan Kromka Alexander Ledinský Martin Hubík Pavel Mareš Jiří Purkrt Adam Fejfar Antonín Kočka Jan |
| author_sort | Cimrová Vĕra |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Enormous research effort has been put into optimizing organic-based opto-electronic systems for efficient generation of free charge carriers. This optimization is mainly due to typically high dissociation energy (0.1-1 eV) and short diffusion length (10 nm) of excitons in organic materials. Inherently, interplay of microscopic structural, chemical, and opto-electronic properties plays crucial role. We show that employing and combining advanced scanning probe techniques can provide us significant insight into the correlation of these properties. By adjusting parameters of contact- and tapping-mode atomic force microscopy (AFM), we perform morphologic and mechanical characterizations (nanoshaving) of organic layers, measure their electrical conductivity by current-sensing AFM, and deduce work functions and surface photovoltage (SPV) effects by Kelvin force microscopy using high spatial resolution. These data are further correlated with local material composition detected using micro-Raman spectroscopy and with other electronic transport data. We demonstrate benefits of this multi-dimensional characterizations on (i) bulk heterojunction of fully organic composite films, indicating differences in blend quality and component segregation leading to local shunts of photovoltaic cell, and (ii) thin-film heterojunction of polypyrrole (PPy) electropolymerized on hydrogen-terminated diamond, indicating covalent bonding and transfer of charge carriers from PPy to diamond.</p> |
| first_indexed | 2024-03-12T19:23:17Z |
| format | Article |
| id | doaj.art-e95bf550b7b445608568761784db65c7 |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T19:23:17Z |
| publishDate | 2011-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nanoscale Research Letters |
| spelling | doaj.art-e95bf550b7b445608568761784db65c72023-08-02T05:01:37ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2011-01-0161238Synthesis, structure, and opto-electronic properties of organic-based nanoscale heterojunctionsCimrová VĕraRezek BohuslavČermák JanKromka AlexanderLedinský MartinHubík PavelMareš JiříPurkrt AdamFejfar AntonínKočka Jan<p>Abstract</p> <p>Enormous research effort has been put into optimizing organic-based opto-electronic systems for efficient generation of free charge carriers. This optimization is mainly due to typically high dissociation energy (0.1-1 eV) and short diffusion length (10 nm) of excitons in organic materials. Inherently, interplay of microscopic structural, chemical, and opto-electronic properties plays crucial role. We show that employing and combining advanced scanning probe techniques can provide us significant insight into the correlation of these properties. By adjusting parameters of contact- and tapping-mode atomic force microscopy (AFM), we perform morphologic and mechanical characterizations (nanoshaving) of organic layers, measure their electrical conductivity by current-sensing AFM, and deduce work functions and surface photovoltage (SPV) effects by Kelvin force microscopy using high spatial resolution. These data are further correlated with local material composition detected using micro-Raman spectroscopy and with other electronic transport data. We demonstrate benefits of this multi-dimensional characterizations on (i) bulk heterojunction of fully organic composite films, indicating differences in blend quality and component segregation leading to local shunts of photovoltaic cell, and (ii) thin-film heterojunction of polypyrrole (PPy) electropolymerized on hydrogen-terminated diamond, indicating covalent bonding and transfer of charge carriers from PPy to diamond.</p>http://www.nanoscalereslett.com/content/6/1/238 |
| spellingShingle | Cimrová Vĕra Rezek Bohuslav Čermák Jan Kromka Alexander Ledinský Martin Hubík Pavel Mareš Jiří Purkrt Adam Fejfar Antonín Kočka Jan Synthesis, structure, and opto-electronic properties of organic-based nanoscale heterojunctions Nanoscale Research Letters |
| title | Synthesis, structure, and opto-electronic properties of organic-based nanoscale heterojunctions |
| title_full | Synthesis, structure, and opto-electronic properties of organic-based nanoscale heterojunctions |
| title_fullStr | Synthesis, structure, and opto-electronic properties of organic-based nanoscale heterojunctions |
| title_full_unstemmed | Synthesis, structure, and opto-electronic properties of organic-based nanoscale heterojunctions |
| title_short | Synthesis, structure, and opto-electronic properties of organic-based nanoscale heterojunctions |
| title_sort | synthesis structure and opto electronic properties of organic based nanoscale heterojunctions |
| url | http://www.nanoscalereslett.com/content/6/1/238 |
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