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Ultra-Small 2D PbS Nanoplatelets : Liquid-Phase Exfoliation and Emerging Applications for Photo-Electrochemical Photodetectors
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- Gao, Lingfeng (författare)
- Shenzhen Univ, Coll Phys & Optoelect Engn,Shenzhen Key Lab Micro, Inst Microscale Optoelect,Collaborat Innovat Ctr, Key Lab Optoelect Devices & Syst,Minist Educ & Gu, Shenzhen 518060, Peoples R China.
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- Chen, Hualong (författare)
- Shenzhen Univ, Coll Phys & Optoelect Engn,Shenzhen Key Lab Micro, Inst Microscale Optoelect,Collaborat Innovat Ctr, Key Lab Optoelect Devices & Syst,Minist Educ & Gu, Shenzhen 518060, Peoples R China.
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- Wang, Rui (författare)
- Shenzhen Univ, Coll Phys & Optoelect Engn,Shenzhen Key Lab Micro, Inst Microscale Optoelect,Collaborat Innovat Ctr, Key Lab Optoelect Devices & Syst,Minist Educ & Gu, Shenzhen 518060, Peoples R China.;Xiamen Univ, Dept Elect Engn, Xiamen 361005, Peoples R China.
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- Shenzhen Univ, Coll Phys & Optoelect Engn,Shenzhen Key Lab Micro, Inst Microscale Optoelect,Collaborat Innovat Ctr, Key Lab Optoelect Devices & Syst,Minist Educ & Gu, Shenzhen 518060, Peoples R China Shenzhen Univ, Coll Phys & Optoelect Engn,Shenzhen Key Lab Micro, Inst Microscale Optoelect,Collaborat Innovat Ctr, Key Lab Optoelect Devices & Syst,Minist Educ & Gu, Shenzhen 518060, Peoples R China.;Xiamen Univ, Dept Elect Engn, Xiamen 361005, Peoples R China. (creator_code:org_t)
- 2021-01-15
- 2021
- Engelska.
- Ingår i: Small. - : John Wiley & Sons. - 1613-6810 .- 1613-6829. ; 17:5
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- 2D PbS nanoplatelets (NPLs) form an emerging class of photoactive materials and have been proposed as robust materials for high-performance optoelectronic devices. However, the main drawback of PbS NPLs is the large lateral size, which inhibits their further investigations and practical applications. In this work, ultra-small 2D PbS NPLs with uniform lateral size (11.2 +/- 1.7 nm) and thickness (3.7 +/- 0.9 nm, approximate to 6 layers) have been successfully fabricated by a facile liquid-phase exfoliation approach. Their transient optical response and photo-response behavior are evaluated by femtosecond-resolved transient absorption and photo-electrochemical (PEC) measurements. It is shown that the NPLs-based photodetectors (PDs) exhibit excellent photo-response performance from UV to the visible range, showing extremely high photo-responsivity (27.81 mA W-1) and remarkable detectivity (3.96 x 10(10) Jones), which are figures of merit outperforming currently reported PEC-type PDs. The outstanding properties are further analyzed based on the results of first-principle calculations, including electronic band structure and free energies for the oxygen evolution reaction process. This work highlights promising applications of ultra-small 2D PbS NPLs with the potential for breakthrough developments also in other fields of optoelectronic devices.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- DFT
- liquid-phase exfoliation
- nanoplatelets
- photodetectors
- transient optical response
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- Gao, Lingfeng
- Chen, Hualong
- Wang, Rui
- Wei, Songrui
- Kuklin, Artem, V
- Mei, Shan
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- Zhang, Feng
- Zhang, Ye
- Jiang, Xiantao
- Luo, Zhengqian
- Xu, Shixiang
- Zhang, Han
- Ågren, Hans
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