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Associate professor

Supervisor of Master's Candidates

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Education Level:博士研究生

Degree:工学博士

Discipline:Material Science

居佃兴

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Education Level:博士研究生

Paper Publications

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

Impact Factor:22.0
DOI number:10.1021/acsenergylett.8b02113
Journal:ACS Energy Letters
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.
Indexed by:Journal paper
Discipline:Engineering
First-Level Discipline:Materials Science and Engineering
Document Type:J
Translation or Not:no
Date of Publication:2018-12-10
Included Journals:SCI
Links to published journals:https://pubs.acs.org/doi/full/10.1021/acsenergylett.8b02113