2D black phosphorous nanosheets as a hole transporting material in perovskite solar cells
We demonstrate for the first-time liquid exfoliated few layers of 2D Black phosphorus (BP) nanosheets as a hole transporting material (HTM) for perovskite based solar cells. The photoelectron spectroscopy in air (PESA) measurements confirm the low laying valence band level of BP nanosheets (−5.2 eV)...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/140946 |
| _version_ | 1826118936098242560 |
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| author | Muduli, Subas Kumar Varrla, Eswaraiah Kulkarni, Sneha Avinash Han, Guifang Thirumal, Krishnamoorthy Lev, Ovadia Mhaisalkar, Subodh Mathews, Nripan |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Muduli, Subas Kumar Varrla, Eswaraiah Kulkarni, Sneha Avinash Han, Guifang Thirumal, Krishnamoorthy Lev, Ovadia Mhaisalkar, Subodh Mathews, Nripan |
| author_sort | Muduli, Subas Kumar |
| collection | NTU |
| description | We demonstrate for the first-time liquid exfoliated few layers of 2D Black phosphorus (BP) nanosheets as a hole transporting material (HTM) for perovskite based solar cells. The photoelectron spectroscopy in air (PESA) measurements confirm the low laying valence band level of BP nanosheets (−5.2 eV) favourable for hole injection from CH3NH3PbI3 (MAPbI3). Our results show that ∼25% improvement in power conversion efficiency (PCE) of η = 16.4% for BP nanosheets + Spiro-OMeTAD as an HTM as compared to spiro-OMeTAD (η = 13.1%). When BP nanosheets are exclusively utilised as an HTM, a PCE of η = 7.88% is noted, an improvement over the 4% PCE values observed for HTM free devices. Photoluminescence (PL) quenching of MAPbI3 and impedance measurements further confirm the charge extraction ability of BP nanosheets. The structural and optical characterization of liquid exfoliated BP nanosheets is discussed in detail with the aid of transmission electron microscopy, Raman spectroscopy, absorption spectroscopy and photo-electron spectroscopy. |
| first_indexed | 2024-10-01T04:51:42Z |
| format | Journal Article |
| id | ntu-10356/140946 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:51:42Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1409462021-01-08T05:52:38Z 2D black phosphorous nanosheets as a hole transporting material in perovskite solar cells Muduli, Subas Kumar Varrla, Eswaraiah Kulkarni, Sneha Avinash Han, Guifang Thirumal, Krishnamoorthy Lev, Ovadia Mhaisalkar, Subodh Mathews, Nripan School of Materials Science and Engineering Energy Research Institute @ NTU (ERI@N) Engineering::Materials Black phosphorus (BP) HTM We demonstrate for the first-time liquid exfoliated few layers of 2D Black phosphorus (BP) nanosheets as a hole transporting material (HTM) for perovskite based solar cells. The photoelectron spectroscopy in air (PESA) measurements confirm the low laying valence band level of BP nanosheets (−5.2 eV) favourable for hole injection from CH3NH3PbI3 (MAPbI3). Our results show that ∼25% improvement in power conversion efficiency (PCE) of η = 16.4% for BP nanosheets + Spiro-OMeTAD as an HTM as compared to spiro-OMeTAD (η = 13.1%). When BP nanosheets are exclusively utilised as an HTM, a PCE of η = 7.88% is noted, an improvement over the 4% PCE values observed for HTM free devices. Photoluminescence (PL) quenching of MAPbI3 and impedance measurements further confirm the charge extraction ability of BP nanosheets. The structural and optical characterization of liquid exfoliated BP nanosheets is discussed in detail with the aid of transmission electron microscopy, Raman spectroscopy, absorption spectroscopy and photo-electron spectroscopy. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Accepted version 2020-06-03T03:13:59Z 2020-06-03T03:13:59Z 2017 Journal Article Muduli, S. K., Varrla, E., Kulkarni, S. A., Han, G., Thirumal, K., Lev, O., . . . Mathews, N. (2017). 2D Black phosphorous nanosheets as a hole transporting material in perovskite solar cells. Journal of Power Sources, 371, 156-161. doi:10.1016/j.jpowsour.2017.10.018 0378-7753 https://hdl.handle.net/10356/140946 10.1016/j.jpowsour.2017.10.018 2-s2.0-85032032286 371 156 161 en Journal of Power Sources © 2017 Elsevier B.V. All rights reserved. This paper was published in Journal of Power Sources and is made available with permission of Elsevier B.V. application/pdf application/pdf |
| spellingShingle | Engineering::Materials Black phosphorus (BP) HTM Muduli, Subas Kumar Varrla, Eswaraiah Kulkarni, Sneha Avinash Han, Guifang Thirumal, Krishnamoorthy Lev, Ovadia Mhaisalkar, Subodh Mathews, Nripan 2D black phosphorous nanosheets as a hole transporting material in perovskite solar cells |
| title | 2D black phosphorous nanosheets as a hole transporting material in perovskite solar cells |
| title_full | 2D black phosphorous nanosheets as a hole transporting material in perovskite solar cells |
| title_fullStr | 2D black phosphorous nanosheets as a hole transporting material in perovskite solar cells |
| title_full_unstemmed | 2D black phosphorous nanosheets as a hole transporting material in perovskite solar cells |
| title_short | 2D black phosphorous nanosheets as a hole transporting material in perovskite solar cells |
| title_sort | 2d black phosphorous nanosheets as a hole transporting material in perovskite solar cells |
| topic | Engineering::Materials Black phosphorus (BP) HTM |
| url | https://hdl.handle.net/10356/140946 |
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