國立高雄大學圖資館 |

Language: English

Back

Small Organic Molecules Absorbing Low Energy Photons for Dye Sensitized Solar Cells and Biological Imaging /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Small Organic Molecules Absorbing Low Energy Photons for Dye Sensitized Solar Cells and Biological Imaging /Ravinder Kaur.
Author:	Kaur, Ravinder,
Description:	1 electronic resource (249 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
Notes:	Advisors: Delcamp, Jared H. Committee members: Hammer, Nathan; Jurss, Jonah W.; Mattern, Daniell; Roy, Sudeshna.
Contained By:	Dissertations Abstracts International86-03B.
Subject:	Chemistry.
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31337356
ISBN:	9798384437239

Small Organic Molecules Absorbing Low Energy Photons for Dye Sensitized Solar Cells and Biological Imaging /
Kaur, Ravinder,

Small Organic Molecules Absorbing Low Energy Photons for Dye Sensitized Solar Cells and Biological Imaging /Ravinder Kaur. - 1 electronic resource (249 pages)

Source: Dissertations Abstracts International, Volume: 86-03, Section: B.

Small organic molecules with the ability to access photons at longer wavelengths are greatly needed in the fields of dye sensitized solar cells and biological imaging. Firstly, an urgent challenge limiting the improvement in photocurrent of dye-sensitized solar cell (DSC) technology is the availability of chromophores capable of harvesting the full spectrum of solar irradiation and the judicious employment of these chromophores with other components of the DSC device in order to achieve higher efficiencies. Therefore, strategies are put forward to fabricate and optimize the DSC devices by using novel cross conjugated organic photosensitizers based on benzo[b]thiophene and fused dibenzosilin double donors, which are capable of harvesting photons at longer wavelengths, particularly in the near infrared (NIR) region of the solar spectrum. As a result, optimized photovoltaic devices give outstanding photocurrents and reach a record photocurrent (JSC) value of ~ 27.5 mA/cm2, which is the highest photocurrent in the singly-sensitized DSC field. Secondly, fluorescence imaging with high resolution and sensitivity has been widely studied for bioimaging applications. However, unfavorable light attenuation and auto-fluorescence in tissues at conventional visible and NIR-I imaging windows (400-1000 nm) have severely restricted imaging depth and resolution. Thus, there is an immediate need in the advancement of fluorophores that can absorb in the NIR-II window (NIR-II, 1000-1700 nm), where low auto-fluorescence, reduced photon scattering, and high tissue penetration depth lead to visualization of deep anatomical features in vivo with high resolution and sensitivity. To achieve this target NIR-II window, xanthene based novel florescent bioimaging dyes were synthesized, which are able to absorb and emit in the NIR-II window. Among xanthene-based emissive dyes, emission values >1200 nm are rare but, in this study, a peak emission value of around ~1310 nm was observed.

English

ISBN: 9798384437239Subjects--Topical Terms:

188628
Chemistry.
Subjects--Index Terms:

Biological imaging

Small Organic Molecules Absorbing Low Energy Photons for Dye Sensitized Solar Cells and Biological Imaging /
LDR:03535nmm a22004333i 4500 001 676349
005 20250420214348.5
006 m o d
007 cr|nu||||||||
008 250901s2024 miu||||||m |||||||eng d
020 $a 9798384437239
035 $a (MiAaPQD)AAI31337356
035 $a AAI31337356
040 $a MiAaPQD $b eng $c MiAaPQD $e rda
100 1 $a Kaur, Ravinder, $e author. $3 990134
245 1 0 $a Small Organic Molecules Absorbing Low Energy Photons for Dye Sensitized Solar Cells and Biological Imaging / $c Ravinder Kaur.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 1 electronic resource (249 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
500 $a Advisors: Delcamp, Jared H. Committee members: Hammer, Nathan; Jurss, Jonah W.; Mattern, Daniell; Roy, Sudeshna.
502 $b Ph.D. $c The University of Mississippi $d 2024.
520 $a Small organic molecules with the ability to access photons at longer wavelengths are greatly needed in the fields of dye sensitized solar cells and biological imaging. Firstly, an urgent challenge limiting the improvement in photocurrent of dye-sensitized solar cell (DSC) technology is the availability of chromophores capable of harvesting the full spectrum of solar irradiation and the judicious employment of these chromophores with other components of the DSC device in order to achieve higher efficiencies. Therefore, strategies are put forward to fabricate and optimize the DSC devices by using novel cross conjugated organic photosensitizers based on benzo[b]thiophene and fused dibenzosilin double donors, which are capable of harvesting photons at longer wavelengths, particularly in the near infrared (NIR) region of the solar spectrum. As a result, optimized photovoltaic devices give outstanding photocurrents and reach a record photocurrent (JSC) value of ~ 27.5 mA/cm2, which is the highest photocurrent in the singly-sensitized DSC field. Secondly, fluorescence imaging with high resolution and sensitivity has been widely studied for bioimaging applications. However, unfavorable light attenuation and auto-fluorescence in tissues at conventional visible and NIR-I imaging windows (400-1000 nm) have severely restricted imaging depth and resolution. Thus, there is an immediate need in the advancement of fluorophores that can absorb in the NIR-II window (NIR-II, 1000-1700 nm), where low auto-fluorescence, reduced photon scattering, and high tissue penetration depth lead to visualization of deep anatomical features in vivo with high resolution and sensitivity. To achieve this target NIR-II window, xanthene based novel florescent bioimaging dyes were synthesized, which are able to absorb and emit in the NIR-II window. Among xanthene-based emissive dyes, emission values >1200 nm are rare but, in this study, a peak emission value of around ~1310 nm was observed.
546 $a English
590 $a School code: 0131
650 4 $a Chemistry. $3 188628
650 4 $a Physical chemistry. $3 708580
650 4 $a Energy. $3 212397
653 $a Biological imaging
653 $a Chromophores
653 $a Dye sensitized solar cells
653 $a Fluorophores
653 $a Small organic molecules
690 $a 0485
690 $a 0494
690 $a 0791
710 2 $a The University of Mississippi. $b Chemistry. $e degree granting institution. $3 990135
720 1 $a Delcamp, Jared H. $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 86-03B.
790 $a 0131
791 $a Ph.D.
792 $a 2024
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31337356