Double‐Dipole Induced by Incorporating Nitrogen‐Bromine Hybrid Cathode Interlayers Leads to Suppressed Current Leakage and Enhanced Charge Extraction in Non‐Fullerene Organic Solar Cells
Abstract The cathode interlayer plays a vital role in organic solar cells, which can modify the work function of electrodes, lower the electron extraction barriers, smooth the surface of the active layer, and remove solvent residuals. However, the development of organic cathode interlayer lags behin...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-09-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202302460 |
| _version_ | 1797684951107239936 |
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| author | Yangchao Zheng Jingjing Zhao Huanpeng Liang Zhenmin Zhao Zhipeng Kan |
| author_facet | Yangchao Zheng Jingjing Zhao Huanpeng Liang Zhenmin Zhao Zhipeng Kan |
| author_sort | Yangchao Zheng |
| collection | DOAJ |
| description | Abstract The cathode interlayer plays a vital role in organic solar cells, which can modify the work function of electrodes, lower the electron extraction barriers, smooth the surface of the active layer, and remove solvent residuals. However, the development of organic cathode interlayer lags behind the rapidly improved organic solar cells because their intrinsic high surface tension can lead to poor contact with the active layers. Herein, a double‐dipole strategy is proposed to enhance the properties of organic cathode interlayers, which is induced by incorporating nitrogen‐ and bromine‐containing interlayer materials. To verify this approach, the state‐of‐the‐art active layer composed of PM6:Y6 and two prototypical cathode interlayer materials, PDIN and PFN‐Br is selected. Using the cathode interlayer PDIN: PFN‐Br (0.9:0.1, in wt.%) in the devices can reduce the electrode work function, suppress the dark current leakage, and improve charge extractions, leading to enhanced short circuit current density and fill factor. The bromine ions tend to break from PFN‐Br and form a new chemical bond with the silver electrode, which can adsorb extra dipoles directed from the interlayer to silver. These findings on the double‐dipole strategy provide insights into the hybrid cathode interlayers for efficient non‐fullerene organic solar cells. |
| first_indexed | 2024-03-12T00:37:17Z |
| format | Article |
| id | doaj.art-8f3a3efd676d48f4942b2d9402cf4a9a |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-03-12T00:37:17Z |
| publishDate | 2023-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-8f3a3efd676d48f4942b2d9402cf4a9a2023-09-15T09:28:59ZengWileyAdvanced Science2198-38442023-09-011026n/an/a10.1002/advs.202302460Double‐Dipole Induced by Incorporating Nitrogen‐Bromine Hybrid Cathode Interlayers Leads to Suppressed Current Leakage and Enhanced Charge Extraction in Non‐Fullerene Organic Solar CellsYangchao Zheng0Jingjing Zhao1Huanpeng Liang2Zhenmin Zhao3Zhipeng Kan4Center on Nanoenergy Research Guangxi Colleges and Universities Key Laboratory of Blue Energy and Systems Integration Carbon Peak and Neutrality Science and Technology Development Institute School of Physical Science & Technology Guangxi University Nanning 530004 ChinaCenter on Nanoenergy Research Guangxi Colleges and Universities Key Laboratory of Blue Energy and Systems Integration Carbon Peak and Neutrality Science and Technology Development Institute School of Physical Science & Technology Guangxi University Nanning 530004 ChinaCenter on Nanoenergy Research Guangxi Colleges and Universities Key Laboratory of Blue Energy and Systems Integration Carbon Peak and Neutrality Science and Technology Development Institute School of Physical Science & Technology Guangxi University Nanning 530004 ChinaCenter on Nanoenergy Research Guangxi Colleges and Universities Key Laboratory of Blue Energy and Systems Integration Carbon Peak and Neutrality Science and Technology Development Institute School of Physical Science & Technology Guangxi University Nanning 530004 ChinaCenter on Nanoenergy Research Guangxi Colleges and Universities Key Laboratory of Blue Energy and Systems Integration Carbon Peak and Neutrality Science and Technology Development Institute School of Physical Science & Technology Guangxi University Nanning 530004 ChinaAbstract The cathode interlayer plays a vital role in organic solar cells, which can modify the work function of electrodes, lower the electron extraction barriers, smooth the surface of the active layer, and remove solvent residuals. However, the development of organic cathode interlayer lags behind the rapidly improved organic solar cells because their intrinsic high surface tension can lead to poor contact with the active layers. Herein, a double‐dipole strategy is proposed to enhance the properties of organic cathode interlayers, which is induced by incorporating nitrogen‐ and bromine‐containing interlayer materials. To verify this approach, the state‐of‐the‐art active layer composed of PM6:Y6 and two prototypical cathode interlayer materials, PDIN and PFN‐Br is selected. Using the cathode interlayer PDIN: PFN‐Br (0.9:0.1, in wt.%) in the devices can reduce the electrode work function, suppress the dark current leakage, and improve charge extractions, leading to enhanced short circuit current density and fill factor. The bromine ions tend to break from PFN‐Br and form a new chemical bond with the silver electrode, which can adsorb extra dipoles directed from the interlayer to silver. These findings on the double‐dipole strategy provide insights into the hybrid cathode interlayers for efficient non‐fullerene organic solar cells.https://doi.org/10.1002/advs.202302460cathode interlayercharge extractiondouble‐dipolefill factor |
| spellingShingle | Yangchao Zheng Jingjing Zhao Huanpeng Liang Zhenmin Zhao Zhipeng Kan Double‐Dipole Induced by Incorporating Nitrogen‐Bromine Hybrid Cathode Interlayers Leads to Suppressed Current Leakage and Enhanced Charge Extraction in Non‐Fullerene Organic Solar Cells Advanced Science cathode interlayer charge extraction double‐dipole fill factor |
| title | Double‐Dipole Induced by Incorporating Nitrogen‐Bromine Hybrid Cathode Interlayers Leads to Suppressed Current Leakage and Enhanced Charge Extraction in Non‐Fullerene Organic Solar Cells |
| title_full | Double‐Dipole Induced by Incorporating Nitrogen‐Bromine Hybrid Cathode Interlayers Leads to Suppressed Current Leakage and Enhanced Charge Extraction in Non‐Fullerene Organic Solar Cells |
| title_fullStr | Double‐Dipole Induced by Incorporating Nitrogen‐Bromine Hybrid Cathode Interlayers Leads to Suppressed Current Leakage and Enhanced Charge Extraction in Non‐Fullerene Organic Solar Cells |
| title_full_unstemmed | Double‐Dipole Induced by Incorporating Nitrogen‐Bromine Hybrid Cathode Interlayers Leads to Suppressed Current Leakage and Enhanced Charge Extraction in Non‐Fullerene Organic Solar Cells |
| title_short | Double‐Dipole Induced by Incorporating Nitrogen‐Bromine Hybrid Cathode Interlayers Leads to Suppressed Current Leakage and Enhanced Charge Extraction in Non‐Fullerene Organic Solar Cells |
| title_sort | double dipole induced by incorporating nitrogen bromine hybrid cathode interlayers leads to suppressed current leakage and enhanced charge extraction in non fullerene organic solar cells |
| topic | cathode interlayer charge extraction double‐dipole fill factor |
| url | https://doi.org/10.1002/advs.202302460 |
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