Size- and Temperature-Dependent Carrier Dynamics in Oleic Acid Capped PbS Quantum Dots
作者： Peristera Andreakou , Mael Brossard , Chunyong Li , Maria Bernechea , Gerasimos Konstantatos
DOI: 10.1021/JP3054108
关键词: Surface states 、 Optoelectronics 、 Atmospheric temperature range 、 Carrier dynamics 、 Materials science 、 Quantum dot 、 Oleic acid 、 Photoluminescence 、 Analytical chemistry
摘要: In this work, we investigate the temperature dependence of photoluminescence decay and integrated oleic acid capped PbS quantum dots with diameters ranging from 2.3 to 3.5 nm over a broad range (6–290 K). All investigated samples exhibit similar behavior, consisting three different regimes. The low-temperature regime ( 250 K) is governed by quenched intensity acceleration in average lifetimes. We propose three-level system, composed bright, dark, surface states, which describes observed dynamics QDs.
acs.org
core.ac.uk
sci-hub.se 参考文章(33)
Maxim S. Gaponenko, Andrey A. Lutich, Nikolai A. Tolstik, Alexei A. Onushchenko, Alexander M. Malyarevich, Eugene P. Petrov, Konstantin V. Yumashev, Temperature-dependent photoluminescence of PbS quantum dots in glass: Evidence of exciton state splitting and carrier trapping Physical Review B. ,vol. 82, pp. 125320- ,(2010) , 10.1103/PHYSREVB.82.125320
LeeAnn Kim, Polina O. Anikeeva, Seth A. Coe-Sullivan, Jonathan S. Steckel, Moungi G. Bawendi, Vladimir Bulović, Contact Printing of Quantum Dot Light-Emitting Devices Nano Letters. ,vol. 8, pp. 4513- 4517 ,(2008) , 10.1021/NL8025218
R. Espiau de Lamaëstre, H. Bernas, D. Pacifici, G. Franzó, F. Priolo, Evidence for a “dark exciton” state of PbS nanocrystals in a silicate glass Applied Physics Letters. ,vol. 88, pp. 181115- ,(2006) , 10.1063/1.2201885
D. J. Farrell, Y. Takeda, K. Nishikawa, T. Nagashima, T. Motohiro, N. J. Ekins-Daukes, A hot-carrier solar cell with optical energy selective contacts Applied Physics Letters. ,vol. 99, pp. 111102- ,(2011) , 10.1063/1.3636401
Fan Xu, Xin Ma, Chelsea R Haughn, Jamie Benavides, Matthew F Doty, Sylvain G Cloutier, None, Efficient Exciton Funneling in Cascaded PbS Quantum Dot Superstructures ACS Nano. ,vol. 5, pp. 9950- 9957 ,(2011) , 10.1021/NN203728T
Dmitri V Talapin, Christopher B Murray, PbSe Nanocrystal Solids for n- and p-Channel Thin Film Field-Effect Transistors Science. ,vol. 310, pp. 86- 89 ,(2005) , 10.1126/SCIENCE.1116703
Gerasimos Konstantatos, Jason Clifford, Larissa Levina, Edward H. Sargent, Sensitive solution-processed visible-wavelength photodetectors Nature Photonics. ,vol. 1, pp. 531- 534 ,(2007) , 10.1038/NPHOTON.2007.147
Jangwon Seo, Min Ju Cho, Dongho Lee, A. N. Cartwright, Paras N. Prasad, Efficient Heterojunction Photovoltaic Cell Utilizing Nanocomposites of Lead Sulfide Nanocrystals and a Low‐Bandgap Polymer Advanced Materials. ,vol. 23, pp. 3984- 3988 ,(2011) , 10.1002/ADMA.201101912
M.A. Hines, G.D. Scholes, Colloidal PbS Nanocrystals with Size-Tunable Near-Infrared Emission: Observation of Post-Synthesis Self-Narrowing of the Particle Size Distribution Advanced Materials. ,vol. 15, pp. 1844- 1849 ,(2003) , 10.1002/ADMA.200305395
Siyuan Lu, Zachary Lingley, Tetsuya Asano, Daniel Harris, Tymon Barwicz, Supratik Guha, Anupam Madhukar, Photocurrent induced by nonradiative energy transfer from nanocrystal quantum dots to adjacent silicon nanowire conducting channels: toward a new solar cell paradigm. Nano Letters. ,vol. 9, pp. 4548- 4552 ,(2009) , 10.1021/NL903104K