What Role Can Surface Capping Ligand Play To Control Dopant Emission in Semiconductor Nanoparticles?

被引:13
作者
Bhar, Madhumita [1 ]
Rudra, Saoni [1 ]
Mukherjee, Prasun [1 ]
机构
[1] Univ Calcutta, Ctr Res Nanosci & Nanotechnol, Kolkata 700106, W Bengal, India
关键词
ZINC-SULFIDE NANOPARTICLES; TITANIUM-DIOXIDE NANOPARTICLES; CATION-EXCHANGE; LUMINESCENCE; SIZE; DEPENDENCE; PHOTOLUMINESCENCE; NANOCLUSTERS; NANOCRYSTALS; SENSITIZE;
D O I
10.1021/acs.jpcc.9b11074
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The role of surface capping ligands in controlling dopant photoluminescence in semiconductor nanoparticles is examined by monitoring emission in terbium cation incorporated zinc sulfide [Zn(Tb)S] nanoparticles, as a function of [H+] that is varied postsynthetically. Increases in Tb3+ emission of similar to 6 and similar to 1.3 times are observed on changing the pH from 4 to 7 and from 7 to 11, respectively. An increased contribution of host sensitization over direct excitation is observed under basic conditions. Subtle structural modification of the capping ligand is argued to be solely responsible for the dopant emission in the acidic-neutral range. The neutral-basic range in addition to this effect has a minor contribution from alteration in band alignment as well. A major outcome from this work relates to identifying the role of the terminally placed functional group in the capping ligand to control emissions from both the host (zinc sulfide nanoparticles) and guest (Tb3+), with a pronounced effect on dopant Tb3+ emission in the 1-thioglycerol capped Zn(Tb)S nanoparticles. These results identify surface engineering as an important modulator, in addition to the primary criteria of (a) band gap engineering and (b) breaking (or optimizing) dopant local site symmetry in maximizing (or guiding) dopant emission in doped semiconductor nanoparticles.
引用
收藏
页码:6588 / 6597
页数:10
相关论文
共 47 条
[21]   Lanthanide cation-induced tuning of surface capping properties in zinc sulfide nanoparticles: an infrared absorption study [J].
Ghatak, Ankita ;
Debnath, Gouranga H. ;
Mandal, Madhuri ;
Mukherjee, Prasun .
RSC ADVANCES, 2015, 5 (42) :32920-32932
[22]   Recent Advances in Quantum Dot Surface Chemistry [J].
Hines, Douglas A. ;
Kamat, Prashant V. .
ACS APPLIED MATERIALS & INTERFACES, 2014, 6 (05) :3041-3057
[23]   Quantum Dot Surface Chemistry: Ligand Effects and Electron Transfer Reactions [J].
Hines, Douglas A. ;
Kamat, Prashant V. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2013, 117 (27) :14418-14426
[24]   Optically induced deexcitation of rare-earth ions in a semiconductor matrix [J].
Klik, MAJ ;
Gregorkiewicz, T ;
Bradley, IV ;
Wells, JPR .
PHYSICAL REVIEW LETTERS, 2002, 89 (22)
[25]  
Kononenko L. I., 1975, J APPL SPECTROSC, V2, P1484
[26]   Alloyed Copper Chalcogenide Nanoplatelets via Partial Cation Exchange Reactions [J].
Lesnyak, Vladimir ;
George, Chandramohan ;
Genovese, Alessandro ;
Prato, Mirko ;
Casu, Alberto ;
Ayyappan, S. ;
Scarpellini, Alice ;
Manna, Liberato .
ACS NANO, 2014, 8 (08) :8407-8418
[27]   On the (uninteresting) dependence of the absorption and emission transition moments of coumarin 153 on solvent [J].
Lewis, JE ;
Maroncelli, M .
CHEMICAL PHYSICS LETTERS, 1998, 282 (02) :197-203
[28]   Luminescence of europium(III) and terbium(III) complexes incorporated in poly(vinyl pyrrolidone) matrix [J].
Li, Q ;
Li, T ;
Wu, JG .
JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (49) :12293-12296
[29]   Evidence of trivalent europium incorporated in anatase TiO2 nanocrystals with multiple sites [J].
Luo, Wenqin ;
Li, Renfu ;
Liu, Guokui ;
Antonio, Mark R. ;
Chen, Xueyuan .
JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (28) :10370-10377
[30]   Host-Sensitized Luminescence of Nd3+ and Sm3+ Ions Incorporated in Anatase Titania Nanocrystals [J].
Luo, Wenqin ;
Li, Renfu ;
Chen, Xueyuan .
JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (20) :8772-8777