Electrochromic semiconductor nanocrystal films

2002 ◽  
Vol 80 (1) ◽  
pp. 4-6 ◽  
Author(s):  
Congjun Wang ◽  
Moonsub Shim ◽  
Philippe Guyot-Sionnest
Keyword(s):  
Semiconductor Nanocrystal ◽  
Nanocrystal Films

Size-Selected Subnanometer Cluster Catalysts on Semiconductor Nanocrystal Films for Atomic Scale Insight into Photocatalysis

Nano Letters ◽  
2012 ◽  
Vol 12 (11) ◽  
pp. 5903-5906 ◽  
Author(s):  
Maximilian J. Berr ◽  
Florian F. Schweinberger ◽  
Markus Döblinger ◽  
Kai E. Sanwald ◽  
Christian Wolff ◽  
...  
Keyword(s):  
Atomic Scale ◽  
Semiconductor Nanocrystal ◽  
Nanocrystal Films ◽  
Insight Into

Intra- and inter-nanocrystal charge transport in nanocrystal films

Nanoscale ◽  
2018 ◽  
Vol 10 (17) ◽  
pp. 8042-8057 ◽  
Author(s):  
Willi Aigner ◽  
Oliver Bienek ◽  
Bruno P. Falcão ◽  
Safwan U. Ahmed ◽  
Hartmut Wiggers ◽  
...  
Keyword(s):  
Charge Transport ◽  
Semiconductor Nanocrystal ◽  
Nanocrystal Films ◽  
Optoelectronic Applications

The exploitation of semiconductor nanocrystal (NC) films in novel electronic and optoelectronic applications requires a better understanding of charge transport in these systems.

Spatial analysis of the photocurrent generation and transport in semiconductor nanocrystal films

2012 ◽  
Vol 86 (7) ◽  
Author(s):  
Stefan Kudera ◽  
Yang Zhang ◽  
Enzo Di Fabrizio ◽  
Liberato Manna ◽  
Roman Krahne
Keyword(s):  
Spatial Analysis ◽  
Semiconductor Nanocrystal ◽  
Photocurrent Generation ◽  
Nanocrystal Films

Chemical Availability of Bromide Dictates CsPbBr3 Nanocrystal Growth

2019 ◽  
Author(s):  
Je-Ruei Wen ◽  
Benjamin Roman ◽  
Freddy Rodriguez Ortiz ◽  
Noel Mireles Villegas ◽  
Nicholas Porcellino ◽  
...  
Keyword(s):  
Reaction Time ◽  
Growth Mechanism ◽  
Chemical Control ◽  
Critical Role ◽  
Phase Evolution ◽  
Detailed Understanding ◽  
Semiconductor Nanocrystal ◽  
Nanocrystal Growth ◽  
Chemical Availability

Lack of detailed understanding of the growth mechanism of CsPbBr3 nanocrystals has hindered sophisticated morphological and chemical control of this important emerging optoelectronic material. Here, we have elucidated the growth mechanism by slowing the reaction kinetics. When 1-bromohexane is used as an alternative halide source, bromide is slowly released into the reaction mixture, extending the reaction time from ~3 seconds to greater than 20 minutes. This enables us to monitor the phase evolution of products over the course of reaction, revealing that CsBr is the initial species formed, followed by Cs4PbBr6, and finally CsPbBr3. Further, formation of monodisperse CsBr nanocrystals is demonstrated in a bromide-deficient and lead-abundant solution. The CsBr can only be transformed into CsPbBr3 nanocubes if additional bromide is added. Our results indicate a fundamentally different growth mechanism for CsPbBr3 in comparison with more established semiconductor nanocrystal systems and reveal the critical role of the chemical availability of bromide for the growth reactions.<br>

scholarly journals Dimension control of in situ fabricated CsPbClBr2 nanocrystal films toward efficient blue light-emitting diodes

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Chenhui Wang ◽  
Dengbao Han ◽  
Junhui Wang ◽  
Yingguo Yang ◽  
Xinyue Liu ◽  
...  
Keyword(s):  
Quantum Well ◽  
Light Emitting Diodes ◽  
Blue Emission ◽  
Light Emitting ◽  
Mixed Ligands ◽  
Dimension Control ◽  
Nanocrystal Films ◽  
Width Distribution ◽  
Quantum Well Width

AbstractIn the field of perovskite light-emitting diodes (PeLEDs), the performance of blue emissive electroluminescence devices lags behind the other counterparts due to the lack of fabrication methodology. Herein, we demonstrate the in situ fabrication of CsPbClBr2 nanocrystal films by using mixed ligands of 2-phenylethanamine bromide (PEABr) and 3,3-diphenylpropylamine bromide (DPPABr). PEABr dominates the formation of quasi-two-dimensional perovskites with small-n domains, while DPPABr induces the formation of large-n domains. Strong blue emission at 470 nm with a photoluminescence quantum yield up to 60% was obtained by mixing the two ligands due to the formation of a narrower quantum-well width distribution. Based on such films, efficient blue PeLEDs with a maximum external quantum efficiency of 8.8% were achieved at 473 nm. Furthermore, we illustrate that the use of dual-ligand with respective tendency of forming small-n and large-n domains is a versatile strategy to achieve narrow quantum-well width distribution for photoluminescence enhancement.

Nanoscale Disorder Generates Subdiffusive Heat Transport in Self-Assembled Nanocrystal Films

Nano Letters ◽  
2021 ◽  
Author(s):  
James K. Utterback ◽  
Aditya Sood ◽  
Igor Coropceanu ◽  
Burak Guzelturk ◽  
Dmitri V. Talapin ◽  
...  
Keyword(s):  
Heat Transport ◽  
Nanocrystal Films ◽  
Self Assembled

Surface localized exciton emission from undoped SnO2 nanocrystal films

2010 ◽  
Vol 97 (22) ◽  
pp. 221105 ◽  
Author(s):  
S. S. Pan ◽  
Y. H. Tian ◽  
Y. Y. Luo ◽  
Y. X. Zhang ◽  
S. Wang ◽  
...  
Keyword(s):  
Exciton Emission ◽  
Undoped Sno2 ◽  
Nanocrystal Films
Sign in / Sign up

Export Citation Format

Share Document