Organic phase cadmium sulfide/cadmium telluride nanocrystalline superstructure, preparation method and applications

A technology of cadmium sulfide and cadmium telluride, applied in chemical instruments and methods, nanotechnology, nanotechnology and other directions, can solve problems such as limited application, and achieve the effects of short time, high yield and stable photochemical properties

Inactive Publication Date: 2016-01-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Kotov et al. prepared this ribbon-like nanocrystalline superstructure in the aqueous phase, and it is difficult to form a miscible mixture with non-polar organic polymers, so that the excitons cannot be effectively realized at the NCsS / polymer interface. separation, which limits its application in optoelectronics

Method used

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  • Organic phase cadmium sulfide/cadmium telluride nanocrystalline superstructure, preparation method and applications
  • Organic phase cadmium sulfide/cadmium telluride nanocrystalline superstructure, preparation method and applications
  • Organic phase cadmium sulfide/cadmium telluride nanocrystalline superstructure, preparation method and applications

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Experimental program
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Effect test

Embodiment 1

[0031] Dissolve 3.6g of CTAB in 100mL of chloroform, add 4mL of NCsS solution with TGA as a ligand into 4mL of CTAB in chloroform, and let the mixture stand. After 8 h, the solution in the chloroform phase was collected to obtain a soft and loose organic phase NCsS structure; 30 mg of P3HT was dissolved in 3 mL of chloroform. Mix 100 μL of NCsS in chloroform and 200 μL of LP3HT solution to obtain the final solution. Spin coating on the pre-cleaned gold electrode (2000rpm) to prepare a photodetector device, in which the mass ratio of poly 3-hexylthiophene (P3HT) and organic phase cadmium sulfide / cadmium telluride nanocrystalline superstructure is 1.2:3.8.

Embodiment 2

[0033] Dissolve 4.0 g of CTAB in 100 mL of chloroform, add 4 mL of NCsS solution with TGA as a ligand into 4 mL of CTAB in chloroform, and let the mixture stand. After 8 h, the solution in the chloroform phase was collected to obtain a soft and loose organic phase NCsS structure; 40.0 mg of P3HT was dissolved in 3 mL of chloroform. Mix 100 μL of NCsS in chloroform and 200 μL of LP3HT solution to obtain the final solution. Spin coating on the pre-cleaned gold electrode (2000rpm) to prepare a photodetector device, in which the mass ratio of poly 3-hexylthiophene (P3HT) and organic phase cadmium sulfide / cadmium telluride nanocrystalline superstructure is 2:4.

Embodiment 3

[0035] Dissolve 3 g of CTAB in 100 mL of chloroform, add 4 mL of NRsS solution with TGA as a ligand into 4 mL of CTAB in chloroform, and let the mixture stand. After 8 h, the solution in the chloroform phase was collected to obtain a soft and loose organic phase NCsS structure; 30.0 mg of P3HT was dissolved in 3 mL of chloroform. Mix 100 μL of NCsS in chloroform and 200 μL of LP3HT solution to obtain the final solution. Spin coating on the pre-cleaned gold electrode (2000rpm) to prepare a photodetector device, in which the mass ratio of poly 3-hexylthiophene (P3HT) and organic phase cadmium sulfide / cadmium telluride nanocrystalline superstructure is 1:3.5.

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Abstract

The invention discloses an organic phase cadmium sulfide/cadmium telluride nanocrystalline superstructure, a preparation method and applications. Firstly, mercaptoacetic acid is employed as a ligand, a water-soluble luminescent cadmium sulfide/cadmium telluride nanocrystalline superstructure is synthesized, then the phase topology structure of the superstructure is trasferred through phase transferring, finally, the superstructure in the organic phase is blended with poly(3-Hexylthiophene) and an organic-inorganic composite optical detection device is prepared. The obtained organic phase cadmium sulfide/cadmium telluride nanocrystalline superstructure has a high fluorescence efficiency, has stable photochemical performances, and has an important meaning to preparation of optical detection devices and optical switches. In addition, the preparation method is advantaged by easy operation, short time and high yield and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, and more specifically relates to a method for preparing a cadmium sulfide / cadmium telluride nanocrystal superstructure by phase transfer and its application in a photodetection device. Background technique [0002] Nanocrystals (NCs) have a strong size effect, special chemical composition and excellent electrical properties ([1] Alivisatos, A.P. Science 1996, 271, 933-937. [2] Zhou, Y.; Yang, M.; Sun, K .; Tang, Z.; Kotov, N.A.J. Am. Chem. Soc. 2010, 132, 6006-6013.). However, the electron mobility between individual nanocrystals is extremely low, and it is impossible to form a continuous charge transport pathway. Therefore, the assembly of individual nanocrystals into desired nanocrystalline superstructures (NCsS) has become a major challenge. In the nanocrystalline superstructure, the electronic coupling between nanocrystals cancels its quantum confinement effect, and at the same time,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/88C08L65/00C08K3/30B82Y30/00B82Y40/00
Inventor 沈永涛郑文珺薛云嘉陈子峰杨松霖
Owner TIANJIN UNIV
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