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Article: Orientation‐Engineered Small‐Molecule Semiconductors as Dopant‐Free Hole Transporting Materials for Efficient and Stable Perovskite Solar Cells
Title | Orientation‐Engineered Small‐Molecule Semiconductors as Dopant‐Free Hole Transporting Materials for Efficient and Stable Perovskite Solar Cells |
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Authors | |
Keywords | dopant-free hole transport materials MAPbI 3 solar cells mobility molecular orientation |
Issue Date | 2021 |
Publisher | Wiley - VCH Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/afm |
Citation | Advanced Functional Materials, 2021, v. 31 n. 20, p. article no. 2011270 How to Cite? |
Abstract | Crystallized p-type small-molecule semiconductors have great potential as an efficient and stable hole transporting materials (HTMs) for perovskite solar cells (PSCs) due to their relatively high hole mobility, good stability, and tunable highest occupied molecular orbitals. Here, a thienoacene-based organic semiconductor, 2,9-diphenyldinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene (DPh-DNTT), is thermally evaporated and employed as the dopant-free HTM that can be scaled up for large-area fabrication. By controlling the deposition temperature, the molecular orientation is modulated into a dominant face-on orientation with π–π stacking direction perpendicular to the substrate surface, maximizing the out-of-plane carrier mobility. With an engineered face-on orientation, the DPh-DNTT film shows an improved out-of-plane mobility of 3.3 × 10−2 cm2 V−1 s−1, outperforming the HTMs reported so far. Such orientation-reinforced mobility contributes to a remarkable efficiency of 20.2% for CH3NH3PbI3 inverted PSCs with enhanced stability. The results reported here provide insights into engineering the orientation of molecules for the dopant-free organic HTMs for PSCs. |
Persistent Identifier | http://hdl.handle.net/10722/298766 |
ISSN | 2023 Impact Factor: 18.5 2023 SCImago Journal Rankings: 5.496 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Zhou, Z | - |
dc.contributor.author | Wu, Q | - |
dc.contributor.author | Cheng, R | - |
dc.contributor.author | Zhang, H | - |
dc.contributor.author | Wang, S | - |
dc.contributor.author | Chen, M | - |
dc.contributor.author | Xie, M | - |
dc.contributor.author | Chan, PKL | - |
dc.contributor.author | Grätzel, M | - |
dc.contributor.author | Feng, SP | - |
dc.date.accessioned | 2021-04-12T03:03:04Z | - |
dc.date.available | 2021-04-12T03:03:04Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Advanced Functional Materials, 2021, v. 31 n. 20, p. article no. 2011270 | - |
dc.identifier.issn | 1616-301X | - |
dc.identifier.uri | http://hdl.handle.net/10722/298766 | - |
dc.description.abstract | Crystallized p-type small-molecule semiconductors have great potential as an efficient and stable hole transporting materials (HTMs) for perovskite solar cells (PSCs) due to their relatively high hole mobility, good stability, and tunable highest occupied molecular orbitals. Here, a thienoacene-based organic semiconductor, 2,9-diphenyldinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene (DPh-DNTT), is thermally evaporated and employed as the dopant-free HTM that can be scaled up for large-area fabrication. By controlling the deposition temperature, the molecular orientation is modulated into a dominant face-on orientation with π–π stacking direction perpendicular to the substrate surface, maximizing the out-of-plane carrier mobility. With an engineered face-on orientation, the DPh-DNTT film shows an improved out-of-plane mobility of 3.3 × 10−2 cm2 V−1 s−1, outperforming the HTMs reported so far. Such orientation-reinforced mobility contributes to a remarkable efficiency of 20.2% for CH3NH3PbI3 inverted PSCs with enhanced stability. The results reported here provide insights into engineering the orientation of molecules for the dopant-free organic HTMs for PSCs. | - |
dc.language | eng | - |
dc.publisher | Wiley - VCH Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/afm | - |
dc.relation.ispartof | Advanced Functional Materials | - |
dc.rights | Submitted (preprint) Version This is the pre-peer reviewed version of the following article: [FULL CITE], which has been published in final form at [Link to final article using the DOI]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. Accepted (peer-reviewed) Version This is the peer reviewed version of the following article: [FULL CITE], which has been published in final form at [Link to final article using the DOI]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. | - |
dc.subject | dopant-free | - |
dc.subject | hole transport materials | - |
dc.subject | MAPbI 3 solar cells | - |
dc.subject | mobility | - |
dc.subject | molecular orientation | - |
dc.title | Orientation‐Engineered Small‐Molecule Semiconductors as Dopant‐Free Hole Transporting Materials for Efficient and Stable Perovskite Solar Cells | - |
dc.type | Article | - |
dc.identifier.email | Zhou, Z: zwzhou@connect.hku.hk | - |
dc.identifier.email | Cheng, R: chengrui@connect.hku.hk | - |
dc.identifier.email | Chen, M: mjchen@hku.hk | - |
dc.identifier.email | Xie, M: mhxie@hku.hk | - |
dc.identifier.email | Chan, PKL: pklc@hku.hk | - |
dc.identifier.email | Feng, SP: hpfeng@hku.hk | - |
dc.identifier.authority | Xie, M=rp00818 | - |
dc.identifier.authority | Chan, PKL=rp01532 | - |
dc.identifier.authority | Feng, SP=rp01533 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1002/adfm.202011270 | - |
dc.identifier.scopus | eid_2-s2.0-85102302665 | - |
dc.identifier.hkuros | 322124 | - |
dc.identifier.volume | 31 | - |
dc.identifier.issue | 20 | - |
dc.identifier.spage | article no. 2011270 | - |
dc.identifier.epage | article no. 2011270 | - |
dc.identifier.isi | WOS:000627499800001 | - |
dc.publisher.place | Germany | - |