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Colloidal mercury chalcogenide quantum dots, intraband transitions and infrared detection.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Colloidal mercury chalcogenide quantum dots, intraband transitions and infrared detection./
作者:	Deng, Zhiyou.
面頁冊數:	1 online resource (117 pages)
附註:	Source: Dissertation Abstracts International, Volume: 78-08(E), Section: B.
標題:	Physical chemistry. -
電子資源:	click for full text (PQDT)
ISBN:	9781369665840

Colloidal mercury chalcogenide quantum dots, intraband transitions and infrared detection.
Deng, Zhiyou.

Colloidal mercury chalcogenide quantum dots, intraband transitions and infrared detection. - 1 online resource (117 pages)

Source: Dissertation Abstracts International, Volume: 78-08(E), Section: B.

Thesis (Ph.D.)--The University of Chicago, 2017.

Includes bibliographical references

After more than 30 years of research on colloidal quantum dots (CQDs), interband transitions have been extensively studied, while intraband transitions---excitations between energy levels within the same band---are underexplored and have not found any application yet. However, intraband transitions have a huge advantage in the application in infrared region (low energy): because the intraband transitions are not limited to narrow bandgap materials, more semiconductor and semimetal materials become potential candidates for infrared application.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781369665840Subjects--Topical Terms:

1148725
Physical chemistry.
Index Terms--Genre/Form:

554714
Electronic books.

Colloidal mercury chalcogenide quantum dots, intraband transitions and infrared detection.
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100 1 $a Deng, Zhiyou. $3 1187112
245 1 0 $a Colloidal mercury chalcogenide quantum dots, intraband transitions and infrared detection.
264 0 $c 2017
300 $a 1 online resource (117 pages)
336 $a text $b txt $2 rdacontent
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500 $a Source: Dissertation Abstracts International, Volume: 78-08(E), Section: B.
500 $a Adviser: Philippe Guyot-Sionnest.
502 $a Thesis (Ph.D.)--The University of Chicago, 2017.
504 $a Includes bibliographical references
520 $a After more than 30 years of research on colloidal quantum dots (CQDs), interband transitions have been extensively studied, while intraband transitions---excitations between energy levels within the same band---are underexplored and have not found any application yet. However, intraband transitions have a huge advantage in the application in infrared region (low energy): because the intraband transitions are not limited to narrow bandgap materials, more semiconductor and semimetal materials become potential candidates for infrared application.
520 $a In this thesis, I will report our progress in i) the synthesis of HgS, HgSe, and HgSe/CdS core/shell CQDs; ii) their optical and electronic properties and their sensitivity to the CQD surface; and iii) intraband transitions and infrared photodetection with them.
520 $a For the first time, we have successfully achieved intraband infrared photodetection in the mid-infrared region (between 3--5 microns), using intraband transitions of air-stable n-doped HgS and HgSe CQDs. Precise control of the doping level is essential to minimize the noise current and to increase the device performance. We also found that the doping level can be influenced by changing the surface condition of the CQDs and the surface gating could be used as a new method to tune the doping level of CQDs. To reduce nonradiative relaxation and improve thermal stability, we also made HgSe/CdS CQDs and studied the shell's effect on the property of the HgSe QDs. It is demonstrated that the shell could enhance the intraband PL and protect the core QDs during annealing process at 200 C°.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Physical chemistry. $3 1148725
650 4 $a Materials science. $3 557839
650 4 $a Chemistry. $3 593913
655 7 $a Electronic books. $2 local $3 554714
690 $a 0494
690 $a 0794
690 $a 0485
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a The University of Chicago. $b Chemistry. $3 1187113
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10239465 $z click for full text (PQDT)