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CdTe Nanocrystal Hetero-Junction Solar Cells with High Open Circuit Voltage Based on Sb-doped TiO2 Electron Acceptor Materials

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Title: CdTe Nanocrystal Hetero-Junction Solar Cells with High Open Circuit Voltage Based on Sb-doped TiO2 Electron Acceptor Materials
Authors: Miaozi Li, Xinyan Liu, Shiya Wen, Songwei Liu, Jingxuan Heng, Donghuan Qin, Lintao Hou, Hongbin Wu, Wei Xu, Wenbo Huang
Source: Nanomaterials, Vol 7, Iss 5, p 101 (2017)
Publisher Information: MDPI AG, 2017.
Publication Year: 2017
Collection: LCC:Chemistry
Subject Terms: nanocrystal, solar cells, CdTe, heterojunction, Chemistry, QD1-999
More Details: We propose Sb-doped TiO2 as electron acceptor material for depleted CdTe nanocrystal (NC) hetero-junction solar cells. Novel devices with the architecture of FTO/ZnO/Sb:TiO2/CdTe/Au based on CdTe NC and TiO2 precursor are fabricated by rational ambient solution process. By introducing TiO2 with dopant concentration, we are able to tailor the optoelectronic properties of NC solar cells. Our novel devices demonstrate a very high open circuit voltage of 0.74 V, which is the highest Voc reported for any CdTe NC based solar cells. The power conversion efficiency (PCE) of solar cells increases with the increase of Sb-doped content from 1% to 3%, then decreases almost linearly with further increase of Sb content due to the recombination effect. The champion device shows Jsc, Voc, FF, and PCE of 14.65 mA/cm2, 0.70 V, 34.44, and 3.53% respectively, which is prospective for solution processed NC solar cells with high Voc.
Document Type: article
File Description: electronic resource
Language: English
ISSN: 2079-4991
Relation: http://www.mdpi.com/2079-4991/7/5/101; https://doaj.org/toc/2079-4991
DOI: 10.3390/nano7050101
Access URL: https://doaj.org/article/d85a4e06430447c1abdf6258ef016197
Accession Number: edsdoj.85a4e06430447c1abdf6258ef016197
Database: Directory of Open Access Journals
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  Data: CdTe Nanocrystal Hetero-Junction Solar Cells with High Open Circuit Voltage Based on Sb-doped TiO2 Electron Acceptor Materials
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  Data: <searchLink fieldCode="AR" term="%22Miaozi+Li%22">Miaozi Li</searchLink><br /><searchLink fieldCode="AR" term="%22Xinyan+Liu%22">Xinyan Liu</searchLink><br /><searchLink fieldCode="AR" term="%22Shiya+Wen%22">Shiya Wen</searchLink><br /><searchLink fieldCode="AR" term="%22Songwei+Liu%22">Songwei Liu</searchLink><br /><searchLink fieldCode="AR" term="%22Jingxuan+Heng%22">Jingxuan Heng</searchLink><br /><searchLink fieldCode="AR" term="%22Donghuan+Qin%22">Donghuan Qin</searchLink><br /><searchLink fieldCode="AR" term="%22Lintao+Hou%22">Lintao Hou</searchLink><br /><searchLink fieldCode="AR" term="%22Hongbin+Wu%22">Hongbin Wu</searchLink><br /><searchLink fieldCode="AR" term="%22Wei+Xu%22">Wei Xu</searchLink><br /><searchLink fieldCode="AR" term="%22Wenbo+Huang%22">Wenbo Huang</searchLink>
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  Data: Nanomaterials, Vol 7, Iss 5, p 101 (2017)
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  Data: MDPI AG, 2017.
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  Data: We propose Sb-doped TiO2 as electron acceptor material for depleted CdTe nanocrystal (NC) hetero-junction solar cells. Novel devices with the architecture of FTO/ZnO/Sb:TiO2/CdTe/Au based on CdTe NC and TiO2 precursor are fabricated by rational ambient solution process. By introducing TiO2 with dopant concentration, we are able to tailor the optoelectronic properties of NC solar cells. Our novel devices demonstrate a very high open circuit voltage of 0.74 V, which is the highest Voc reported for any CdTe NC based solar cells. The power conversion efficiency (PCE) of solar cells increases with the increase of Sb-doped content from 1% to 3%, then decreases almost linearly with further increase of Sb content due to the recombination effect. The champion device shows Jsc, Voc, FF, and PCE of 14.65 mA/cm2, 0.70 V, 34.44, and 3.53% respectively, which is prospective for solution processed NC solar cells with high Voc.
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      – SubjectFull: nanocrystal
        Type: general
      – SubjectFull: solar cells
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      – SubjectFull: CdTe
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