Tellurium-Based Double Perovskites A2TeX6 with Tunable Band Gap and Long Carrier Diffusion Length for Optoelectronic Applications

Dianxing Ju; Xiaopeng Zheng; Jun Yin; Zhiwen Qiu; Bekir Turedi; Xiaolong Liu; Yangyang Dang; Bingqiang Cao; Omar F. Mohammed; Osman Bakr; Xutang Tao

doi:10.1021/acsenergylett.8b02113

Tellurium-Based Double Perovskites A2TeX6 with Tunable Band Gap and Long Carrier Diffusion Length for Optoelectronic Applications

Dianxing Ju, Xiaopeng Zheng, Jun Yin, Zhiwen Qiu, Bekir Turedi, Xiaolong Liu, Yangyang Dang, Bingqiang Cao, Omar F. Mohammed, Osman Bakr, Xutang Tao

Research output: Contribution to journal › Article › peer-review

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Abstract

Lead-free hybrid perovskites have attracted immense interest as environmentally friendly light absorbers. Here, we report on tellurium (Te)-based double perovskites A2TeX6 (A = MA, FA, or BA; X = Br– or I–; MA = CH3NH3; FA = CH(NH2)2; BA = benzylamine) as potentially active materials for optoelectronic devices. These perovskites exhibit a tunable band gap (1.42–2.02 eV), a low trap density (∼1010 cm–3), and a high mobility (∼65 cm2 V–1 s–1). Encouragingly, the MA2TeBr6 single crystal with a band gap of 2.00 eV possesses a long carrier lifetime of ∼6 μs and corresponding carrier diffusion lengths of ∼38 μm, which are ideal characteristics for a material for photodetectors and tandem solar cells. Moreover, A2TeX6 perovskites are relatively robust in ambient conditions, being stable for at least two months without showing any signs of phase change. Our findings bring to the forefront a family of lead-free Te-based perovskites for nontoxic perovskite optoelectronics.

Original language	English (US)
Pages (from-to)	228-234
Number of pages	7
Journal	ACS Energy Letters
Volume	4
Issue number	1
DOIs	https://doi.org/10.1021/acsenergylett.8b02113
State	Published - Dec 10 2018

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was supported by the National Natural Science Foundation of China (Grant Nos. 51321091, 51772170, 51272129, and 51227002), National Key Research and Development Program of China (Grant No. 2016YFB1102201), the Program of Introducing Talents of Disciplines to Universities in China (111 Project 2.0 (Grant No. BP2018013), and King Abdullah University of Science and Technology (KAUST). We greatly thank Xiufeng Cheng and Zhaozhen Cao for their help in thermal properties and TRPL measurements, respectively.

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10.1021/acsenergylett.8b02113

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@article{edeaf0ccbb0c47b6afb2721ff959d393,

title = "Tellurium-Based Double Perovskites A2TeX6 with Tunable Band Gap and Long Carrier Diffusion Length for Optoelectronic Applications",

abstract = "Lead-free hybrid perovskites have attracted immense interest as environmentally friendly light absorbers. Here, we report on tellurium (Te)-based double perovskites A2TeX6 (A = MA, FA, or BA; X = Br– or I–; MA = CH3NH3; FA = CH(NH2)2; BA = benzylamine) as potentially active materials for optoelectronic devices. These perovskites exhibit a tunable band gap (1.42–2.02 eV), a low trap density (∼1010 cm–3), and a high mobility (∼65 cm2 V–1 s–1). Encouragingly, the MA2TeBr6 single crystal with a band gap of 2.00 eV possesses a long carrier lifetime of ∼6 μs and corresponding carrier diffusion lengths of ∼38 μm, which are ideal characteristics for a material for photodetectors and tandem solar cells. Moreover, A2TeX6 perovskites are relatively robust in ambient conditions, being stable for at least two months without showing any signs of phase change. Our findings bring to the forefront a family of lead-free Te-based perovskites for nontoxic perovskite optoelectronics.",

author = "Dianxing Ju and Xiaopeng Zheng and Jun Yin and Zhiwen Qiu and Bekir Turedi and Xiaolong Liu and Yangyang Dang and Bingqiang Cao and Mohammed, {Omar F.} and Osman Bakr and Xutang Tao",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This work was supported by the National Natural Science Foundation of China (Grant Nos. 51321091, 51772170, 51272129, and 51227002), National Key Research and Development Program of China (Grant No. 2016YFB1102201), the Program of Introducing Talents of Disciplines to Universities in China (111 Project 2.0 (Grant No. BP2018013), and King Abdullah University of Science and Technology (KAUST). We greatly thank Xiufeng Cheng and Zhaozhen Cao for their help in thermal properties and TRPL measurements, respectively.",

year = "2018",

month = dec,

day = "10",

doi = "10.1021/acsenergylett.8b02113",

language = "English (US)",

volume = "4",

pages = "228--234",

journal = "ACS Energy Letters",

issn = "2380-8195",

publisher = "American Chemical Society",

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TY - JOUR

T1 - Tellurium-Based Double Perovskites A2TeX6 with Tunable Band Gap and Long Carrier Diffusion Length for Optoelectronic Applications

AU - Ju, Dianxing

AU - Zheng, Xiaopeng

AU - Yin, Jun

AU - Qiu, Zhiwen

AU - Turedi, Bekir

AU - Liu, Xiaolong

AU - Dang, Yangyang

AU - Cao, Bingqiang

AU - Mohammed, Omar F.

AU - Bakr, Osman

AU - Tao, Xutang

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This work was supported by the National Natural Science Foundation of China (Grant Nos. 51321091, 51772170, 51272129, and 51227002), National Key Research and Development Program of China (Grant No. 2016YFB1102201), the Program of Introducing Talents of Disciplines to Universities in China (111 Project 2.0 (Grant No. BP2018013), and King Abdullah University of Science and Technology (KAUST). We greatly thank Xiufeng Cheng and Zhaozhen Cao for their help in thermal properties and TRPL measurements, respectively.

PY - 2018/12/10

Y1 - 2018/12/10

N2 - Lead-free hybrid perovskites have attracted immense interest as environmentally friendly light absorbers. Here, we report on tellurium (Te)-based double perovskites A2TeX6 (A = MA, FA, or BA; X = Br– or I–; MA = CH3NH3; FA = CH(NH2)2; BA = benzylamine) as potentially active materials for optoelectronic devices. These perovskites exhibit a tunable band gap (1.42–2.02 eV), a low trap density (∼1010 cm–3), and a high mobility (∼65 cm2 V–1 s–1). Encouragingly, the MA2TeBr6 single crystal with a band gap of 2.00 eV possesses a long carrier lifetime of ∼6 μs and corresponding carrier diffusion lengths of ∼38 μm, which are ideal characteristics for a material for photodetectors and tandem solar cells. Moreover, A2TeX6 perovskites are relatively robust in ambient conditions, being stable for at least two months without showing any signs of phase change. Our findings bring to the forefront a family of lead-free Te-based perovskites for nontoxic perovskite optoelectronics.

AB - Lead-free hybrid perovskites have attracted immense interest as environmentally friendly light absorbers. Here, we report on tellurium (Te)-based double perovskites A2TeX6 (A = MA, FA, or BA; X = Br– or I–; MA = CH3NH3; FA = CH(NH2)2; BA = benzylamine) as potentially active materials for optoelectronic devices. These perovskites exhibit a tunable band gap (1.42–2.02 eV), a low trap density (∼1010 cm–3), and a high mobility (∼65 cm2 V–1 s–1). Encouragingly, the MA2TeBr6 single crystal with a band gap of 2.00 eV possesses a long carrier lifetime of ∼6 μs and corresponding carrier diffusion lengths of ∼38 μm, which are ideal characteristics for a material for photodetectors and tandem solar cells. Moreover, A2TeX6 perovskites are relatively robust in ambient conditions, being stable for at least two months without showing any signs of phase change. Our findings bring to the forefront a family of lead-free Te-based perovskites for nontoxic perovskite optoelectronics.

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UR - https://pubs.acs.org/doi/10.1021/acsenergylett.8b02113

UR - http://www.scopus.com/inward/record.url?scp=85058802515&partnerID=8YFLogxK

U2 - 10.1021/acsenergylett.8b02113

DO - 10.1021/acsenergylett.8b02113

M3 - Article

SN - 2380-8195

VL - 4

SP - 228

EP - 234

JO - ACS Energy Letters

JF - ACS Energy Letters

IS - 1

ER -

Tellurium-Based Double Perovskites A2TeX6 with Tunable Band Gap and Long Carrier Diffusion Length for Optoelectronic Applications

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