Controlling carrier dynamics using quantum-confined semiconductor nanocrystals

2016 ◽  
Vol 471 ◽  
pp. 1
Author(s):  
Matthew C. Beard ◽  
Victor I. Klimov
Keyword(s):  
Semiconductor Nanocrystals ◽  
Carrier Dynamics ◽  
Quantum Confined

scholarly journals Red-to-Blue Photon Upconversion Enabled by One Dimensional CdTe Nanorods

2020 ◽  
Author(s):  
Zachary A. VanOrman ◽  
Carl R. Conti III ◽  
Geoffrey F. Strouse ◽  
Lea Nienhaus
Keyword(s):  
Semiconductor Nanocrystals ◽  
Stokes Shift ◽  
Visible Spectrum ◽  
High Energy ◽  
Future Research ◽  
Threshold Power ◽  
One Dimensional ◽  
Quantum Confined ◽  
Commercial Applications ◽  
Anti Stokes

<p>Photon upconversion via triplet-triplet annihilation creating light in the high energy regime of the visible spectrum could prove particularly useful in applications such as photocatalysis. Quantum-confined semiconductor nanocrystals have previously been shown to function as efficient triplet sensitizers in green-to-blue upconversion schemes, but an improvement in the apparent anti-Stokes shift of the upconversion scheme will be beneficial for future commercial applications. Additionally, both zero- and two-dimensional quantum-confined sensitizers have been investigated, but not one-dimensional nanomaterials. In this work, we fill a hole in the present field of photon upconversion by accomplishing both of these feats. Specifically, we introduce CdTe nanorods as a new class of triplet sensitizers for red-to-blue photon upconversion. When the triplet transmitter ligand (9-anthracenecarboxylic acid) and triplet annihilator (9,10-diphenylanthracene) are added to the nanorods, we observe efficient photon upconversion at a normalized upconversion efficiency of h<sub>uc </sub>= 4.3% and a low threshold power of I<sub>th</sub> = 93 mW/cm<sup>2</sup>. The introduction of one-dimensional triplet sensitizers could yield future research that effectively harnesses the unique properties of these materials allowing for new approaches for efficient photon upconversion, especially at large apparent anti-Stokes shifts. </p>

scholarly journals Ultrafast charge carrier dynamics in quantum confined 2D perovskite

2020 ◽  
Vol 152 (21) ◽  
pp. 214705
Author(s):  
Giulia Folpini ◽  
Lorenzo Gatto ◽  
Daniele Cortecchia ◽  
Michele Devetta ◽  
Gabriele Crippa ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Carrier Dynamics ◽  
Charge Carrier Dynamics ◽  
Quantum Confined

Multiexciton Annihilation and Dissociation in Quantum Confined Semiconductor Nanocrystals

2012 ◽  
Vol 46 (6) ◽  
pp. 1270-1279 ◽  
Author(s):  
Haiming Zhu ◽  
Ye Yang ◽  
Tianquan Lian
Keyword(s):  
Semiconductor Nanocrystals ◽  
Quantum Confined

scholarly journals Red-to-Blue Photon Upconversion Enabled by One Dimensional CdTe Nanorods

2020 ◽  
Author(s):  
Zachary A. VanOrman ◽  
Carl R. Conti III ◽  
Geoffrey F. Strouse ◽  
Lea Nienhaus
Keyword(s):  
Semiconductor Nanocrystals ◽  
Stokes Shift ◽  
Visible Spectrum ◽  
High Energy ◽  
Future Research ◽  
Threshold Power ◽  
One Dimensional ◽  
Quantum Confined ◽  
Commercial Applications ◽  
Anti Stokes

<p>Photon upconversion via triplet-triplet annihilation creating light in the high energy regime of the visible spectrum could prove particularly useful in applications such as photocatalysis. Quantum-confined semiconductor nanocrystals have previously been shown to function as efficient triplet sensitizers in green-to-blue upconversion schemes, but an improvement in the apparent anti-Stokes shift of the upconversion scheme will be beneficial for future commercial applications. Additionally, both zero- and two-dimensional quantum-confined sensitizers have been investigated, but not one-dimensional nanomaterials. In this work, we fill a hole in the present field of photon upconversion by accomplishing both of these feats. Specifically, we introduce CdTe nanorods as a new class of triplet sensitizers for red-to-blue photon upconversion. When the triplet transmitter ligand (9-anthracenecarboxylic acid) and triplet annihilator (9,10-diphenylanthracene) are added to the nanorods, we observe efficient photon upconversion at a normalized upconversion efficiency of h<sub>uc </sub>= 4.3% and a low threshold power of I<sub>th</sub> = 93 mW/cm<sup>2</sup>. The introduction of one-dimensional triplet sensitizers could yield future research that effectively harnesses the unique properties of these materials allowing for new approaches for efficient photon upconversion, especially at large apparent anti-Stokes shifts. </p>

scholarly journals Red-to-Blue Photon Upconversion Enabled by One Dimensional CdTe Nanorods

2020 ◽  
Author(s):  
Zachary A. VanOrman ◽  
Carl R. Conti III ◽  
Geoffrey F. Strouse ◽  
Lea Nienhaus
Keyword(s):  
Semiconductor Nanocrystals ◽  
Stokes Shift ◽  
Visible Spectrum ◽  
High Energy ◽  
Future Research ◽  
Threshold Power ◽  
One Dimensional ◽  
Quantum Confined ◽  
Commercial Applications ◽  
Anti Stokes

<p>Photon upconversion via triplet-triplet annihilation creating light in the high energy regime of the visible spectrum could prove particularly useful in applications such as photocatalysis. Quantum-confined semiconductor nanocrystals have previously been shown to function as efficient triplet sensitizers in green-to-blue upconversion schemes, but an improvement in the apparent anti-Stokes shift of the upconversion scheme will be beneficial for future commercial applications. Additionally, both zero- and two-dimensional quantum-confined sensitizers have been investigated, but not one-dimensional nanomaterials. In this work, we fill a hole in the present field of photon upconversion by accomplishing both of these feats. Specifically, we introduce CdTe nanorods as a new class of triplet sensitizers for red-to-blue photon upconversion. When the triplet transmitter ligand (9-anthracenecarboxylic acid) and triplet annihilator (9,10-diphenylanthracene) are added to the nanorods, we observe efficient photon upconversion at a normalized upconversion efficiency of h<sub>uc </sub>= 4.3% and a low threshold power of I<sub>th</sub> = 93 mW/cm<sup>2</sup>. The introduction of one-dimensional triplet sensitizers could yield future research that effectively harnesses the unique properties of these materials allowing for new approaches for efficient photon upconversion, especially at large apparent anti-Stokes shifts. </p>

scholarly journals Power law carrier dynamics in semiconductor nanocrystals at nanosecond timescales

2008 ◽  
Vol 92 (10) ◽  
pp. 101111 ◽  
Author(s):  
P. H. Sher ◽  
J. M. Smith ◽  
P. A. Dalgarno ◽  
R. J. Warburton ◽  
X. Chen ◽  
...  
Keyword(s):  
Power Law ◽  
Semiconductor Nanocrystals ◽  
Carrier Dynamics
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