采用热注入的方法在空气氛围中合成PbX(X=S,Se)量子点,液体石蜡和磷酸三丁酯(TBP)作为不同的溶剂优化PbSe量子点的合成;使用六甲基二硅硫烷(TMS)作为硫源合成了第一激子吸收峰在900 ~ 1500 nm分布的PbS量子点.通过透射电镜(TEM)、X射线衍射(XRD)和吸收光谱等测试手段对合成的物质进行成分与光学性能分析表征,对比研究了Ⅳ-Ⅵ族化合物量子点在成核过程中的差异.结果表明在相同的实验条件下PbS量子点的反应条件相对温和,量子限域效应明显;而PbSe量子点的合成对环境的要求更加严苛,反应温度更高,量子点的尺寸分布更宽.
参考文献
[1] | Nozik, AJ.Multiple exciton generation in semiconductor quantum dots[J].Chemical Physics Letters,20081/3(1/3):3-11. |
[2] | Lucjan Jacak.Semiconductor quantum dots-towards a new generation of semiconductor devices[J].European journal of physics: A journal of the European Physical Society,20005(5):487-497. |
[3] | Margaret A. Hines;Gregory D. Scholes.Colloidal PbS nanocrystals with Size-Tunable Near-Infrared Emission: Observation of Post-Synthesis Self-Narrowing of the Particle Size Distribution[J].Advanced Materials,200321(21):1844-1849. |
[4] | 朱思尧 .热注入法合成硒化铅胶体量子点研究[D].华中科技大学,2011. |
[5] | Jiang Tang;Kyle W. Kemp;Sjoerd Hoogland.Colloidal-quantum-dot photovoltaics using atomic-ligand passivation[J].Nature materials,201110(10):765-771. |
[6] | Chia-Hao M. Chuang;Patrick R. Brown;Vladimir Bulovic.Improved performance and stability in quantum dot solar cells through band alignment engineering[J].Nature materials,20148(8):796-801. |
[7] | Octavi E. Semonin;Joseph M. Luther;Sukgeun Choi;Hsiang-Yu Chen;Jianbo Gao;Arthur J. Nozik;Matthew C. Beard.Peak External Photocurrent Quantum Efficiency Exceeding 100% via MEG in a Quantum Dot Solar Cell[J].Science,2011Dec.16 TN.6062(Dec.16 TN.6062):1530-1533. |
[8] | Tang, J.;Brzozowski, L.;Barkhouse, D.A.R.;Wang, X.;Debnath, R.;Wolowiec, R.;Palmiano, E.;Levina, L.;Pattantyus-Abraham, A.G.;Jamakosmanovic, D.;Sargent, E.H..Quantum dot photovoltaics in the extreme quantum confinement regime: The surface-chemical origins of exceptional air- and light-stability[J].ACS nano,20102(2):869-878. |
[9] | William W.Yu;Joshua C.Falkner;Bertram S.Shih;Vicki L.Colvin.Preparation and Characterization of Monodisperse PbSe Semiconductor Nanocrystals in a Noncoordinating Solvent[J].Chemistry of Materials,200417(17):3318-3322. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%