Analyses of All Small Molecule-Based Pentacene/C<sub>60</sub> Organic Photodiodes Using Vacuum Evaporation Method
The vacuum process using small molecule-based organic materials to make organic photodiodes (OPDIs) will provide many promising features, such as well-defined molecular structure, large scalability, process repeatability, and good compatibility for CMOS integration, compared to the widely used Solut...
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MDPI AG
2023-10-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/21/2820 |
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| author | Young Woo Kim Dongwoon Lee Yongmin Jeon Hocheon Yoo Eou-Sik Cho Ezgi Darici Young-Jun Park Kang-Il Seo Sang-Jik Kwon |
| author_facet | Young Woo Kim Dongwoon Lee Yongmin Jeon Hocheon Yoo Eou-Sik Cho Ezgi Darici Young-Jun Park Kang-Il Seo Sang-Jik Kwon |
| author_sort | Young Woo Kim |
| collection | DOAJ |
| description | The vacuum process using small molecule-based organic materials to make organic photodiodes (OPDIs) will provide many promising features, such as well-defined molecular structure, large scalability, process repeatability, and good compatibility for CMOS integration, compared to the widely used Solution process. We present the performance of planar heterojunction OPDIs based on pentacene as the electron donor and C60 as the electron acceptor. In these devices, MoO<sub>3</sub> and BCP interfacial layers were interlaced between the electrodes and the active layer as the electron- and hole-blocking layer, respectively. Typically, BCP played a good role in suppressing the dark current by two orders higher than that without that layer. These devices showed a significant dependence of the performance on the thickness of the pentacene. In particular, with the pentacene thickness of 25 nm, an external quantum efficiency at the 360 nm wavelength according to the peak absorption of C60 was enhanced by 1.5 times due to a cavity effect, compared to that of the non-cavity device. This work shows the importance of a vacuum processing approach based on small molecules for OPDIs, and the possibility of improving the performance via the optimization of the device architecture. |
| first_indexed | 2024-03-11T11:23:58Z |
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| id | doaj.art-0662966cf5ab4f778c4bc0b3c9862eab |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T11:23:58Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj.art-0662966cf5ab4f778c4bc0b3c9862eab2023-11-10T15:09:04ZengMDPI AGNanomaterials2079-49912023-10-011321282010.3390/nano13212820Analyses of All Small Molecule-Based Pentacene/C<sub>60</sub> Organic Photodiodes Using Vacuum Evaporation MethodYoung Woo Kim0Dongwoon Lee1Yongmin Jeon2Hocheon Yoo3Eou-Sik Cho4Ezgi Darici5Young-Jun Park6Kang-Il Seo7Sang-Jik Kwon8Department of Electronics Engineering, Gachon University, 1342 Seongnam-Daero, Sujeong-gu, Seongnam City 13120, Gyeonggi-do, Republic of KoreaDepartment of Electronics Engineering, Gachon University, 1342 Seongnam-Daero, Sujeong-gu, Seongnam City 13120, Gyeonggi-do, Republic of KoreaDepartment of Biomedical Engineering, Gachon University, 1342 Seongnam-Daero, Sujeong-gu, Seongnam City 13120, Gyeonggi-do, Republic of KoreaDepartment of Electronics Engineering, Gachon University, 1342 Seongnam-Daero, Sujeong-gu, Seongnam City 13120, Gyeonggi-do, Republic of KoreaDepartment of Electronics Engineering, Gachon University, 1342 Seongnam-Daero, Sujeong-gu, Seongnam City 13120, Gyeonggi-do, Republic of KoreaCLAP Co., Ltd., 1342 Seongnam-Daero, Sujeong-gu, Seongnam City 13120, Gyeonggi-do, Republic of KoreaCLAP Co., Ltd., 1342 Seongnam-Daero, Sujeong-gu, Seongnam City 13120, Gyeonggi-do, Republic of KoreaCLAP Co., Ltd., 1342 Seongnam-Daero, Sujeong-gu, Seongnam City 13120, Gyeonggi-do, Republic of KoreaDepartment of Electronics Engineering, Gachon University, 1342 Seongnam-Daero, Sujeong-gu, Seongnam City 13120, Gyeonggi-do, Republic of KoreaThe vacuum process using small molecule-based organic materials to make organic photodiodes (OPDIs) will provide many promising features, such as well-defined molecular structure, large scalability, process repeatability, and good compatibility for CMOS integration, compared to the widely used Solution process. We present the performance of planar heterojunction OPDIs based on pentacene as the electron donor and C60 as the electron acceptor. In these devices, MoO<sub>3</sub> and BCP interfacial layers were interlaced between the electrodes and the active layer as the electron- and hole-blocking layer, respectively. Typically, BCP played a good role in suppressing the dark current by two orders higher than that without that layer. These devices showed a significant dependence of the performance on the thickness of the pentacene. In particular, with the pentacene thickness of 25 nm, an external quantum efficiency at the 360 nm wavelength according to the peak absorption of C60 was enhanced by 1.5 times due to a cavity effect, compared to that of the non-cavity device. This work shows the importance of a vacuum processing approach based on small molecules for OPDIs, and the possibility of improving the performance via the optimization of the device architecture.https://www.mdpi.com/2079-4991/13/21/2820OPDIsmall moleculespentaceneC60vacuum processingcavity effect |
| spellingShingle | Young Woo Kim Dongwoon Lee Yongmin Jeon Hocheon Yoo Eou-Sik Cho Ezgi Darici Young-Jun Park Kang-Il Seo Sang-Jik Kwon Analyses of All Small Molecule-Based Pentacene/C<sub>60</sub> Organic Photodiodes Using Vacuum Evaporation Method Nanomaterials OPDI small molecules pentacene C60 vacuum processing cavity effect |
| title | Analyses of All Small Molecule-Based Pentacene/C<sub>60</sub> Organic Photodiodes Using Vacuum Evaporation Method |
| title_full | Analyses of All Small Molecule-Based Pentacene/C<sub>60</sub> Organic Photodiodes Using Vacuum Evaporation Method |
| title_fullStr | Analyses of All Small Molecule-Based Pentacene/C<sub>60</sub> Organic Photodiodes Using Vacuum Evaporation Method |
| title_full_unstemmed | Analyses of All Small Molecule-Based Pentacene/C<sub>60</sub> Organic Photodiodes Using Vacuum Evaporation Method |
| title_short | Analyses of All Small Molecule-Based Pentacene/C<sub>60</sub> Organic Photodiodes Using Vacuum Evaporation Method |
| title_sort | analyses of all small molecule based pentacene c sub 60 sub organic photodiodes using vacuum evaporation method |
| topic | OPDI small molecules pentacene C60 vacuum processing cavity effect |
| url | https://www.mdpi.com/2079-4991/13/21/2820 |
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