Literature DB >> 26134373

Identifying and Eliminating Emissive Sub-bandgap States in Thin Films of PbS Nanocrystals.

Gyu Weon Hwang1, Donghun Kim1, Jose M Cordero2, Mark W B Wilson2, Chia-Hao M Chuang1, Jeffrey C Grossman1, Moungi G Bawendi2.   

Abstract

Chemical oxidation of under-charged Pb atoms reduces the density of trap states by a factor of 40 in films of colloidal PbS quantum dots for devices. These emissive sub-bandgap states are a byproduct of several standard ligand-exchange procedures. X-ray photoelectron spectro-scopy measurements and density function theory simulations demonstrate that they are associated with under-charged Pb.
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Entities:  

Keywords:  lead sulfide; origin of trap states; quantum dots; sub-bandgap emission; trap density

Year:  2015        PMID： 26134373      PMCID： PMC4755932          DOI： 10.1002/adma.201501156

Source DB:  PubMed          Journal:  Adv Mater        ISSN： 0935-9648            Impact factor:   30.849


  39 in total

1.  Generalized Gradient Approximation Made Simple.

Authors: 
Journal:  Phys Rev Lett       Date:  1996-10-28       Impact factor: 9.161

2.  Charge trapping in bright and dark states of coupled PbS quantum dot films.

Authors:  Jianbo Gao; Justin C Johnson
Journal:  ACS Nano       Date:  2012-03-30       Impact factor: 15.881

Review 3.  Nanostructured materials for photon detection.

Authors:  Gerasimos Konstantatos; Edward H Sargent
Journal:  Nat Nanotechnol       Date:  2010-05-16       Impact factor: 39.213

4.  Dynamic Trap Formation and Elimination in Colloidal Quantum Dots.

Authors:  O Voznyy; S M Thon; A H Ip; E H Sargent
Journal:  J Phys Chem Lett       Date:  2013-03-11       Impact factor: 6.475

5.  25th anniversary article: Colloidal quantum dot materials and devices: a quarter-century of advances.

Authors:  Jin Young Kim; Oleksandr Voznyy; David Zhitomirsky; Edward H Sargent
Journal:  Adv Mater       Date:  2013-09-04       Impact factor: 30.849

6.  Joint mapping of mobility and trap density in colloidal quantum dot solids.

Authors:  Philipp Stadler; Brandon R Sutherland; Yuan Ren; Zhijun Ning; Arash Simchi; Susanna M Thon; Sjoerd Hoogland; Edward H Sargent
Journal:  ACS Nano       Date:  2013-06-24       Impact factor: 15.881

7.  A charge-orbital balance picture of doping in colloidal quantum dot solids.

Authors:  Oleksandr Voznyy; David Zhitomirsky; Philipp Stadler; Zhijun Ning; Sjoerd Hoogland; Edward H Sargent
Journal:  ACS Nano       Date:  2012-09-07       Impact factor: 15.881

8.  Hybrid passivated colloidal quantum dot solids.

Authors:  Alexander H Ip; Susanna M Thon; Sjoerd Hoogland; Oleksandr Voznyy; David Zhitomirsky; Ratan Debnath; Larissa Levina; Lisa R Rollny; Graham H Carey; Armin Fischer; Kyle W Kemp; Illan J Kramer; Zhijun Ning; André J Labelle; Kang Wei Chou; Aram Amassian; Edward H Sargent
Journal:  Nat Nanotechnol       Date:  2012-07-29       Impact factor: 39.213

9.  Low-temperature solution-processed solar cells based on PbS colloidal quantum dot/CdS heterojunctions.

Authors:  Liang-Yi Chang; Richard R Lunt; Patrick R Brown; Vladimir Bulović; Moungi G Bawendi
Journal:  Nano Lett       Date:  2013-02-13       Impact factor: 11.189

10.  A quantitative model for charge carrier transport, trapping and recombination in nanocrystal-based solar cells.

Authors:  Deniz Bozyigit; Weyde M M Lin; Nuri Yazdani; Olesya Yarema; Vanessa Wood
Journal:  Nat Commun       Date:  2015-01-27       Impact factor: 14.919
View more
  7 in total

1.  Carrier dynamics and the role of surface defects: Designing a photocatalyst for gas-phase CO2 reduction.

Authors:  Laura B Hoch; Paul Szymanski; Kulbir Kaur Ghuman; Le He; Kristine Liao; Qiao Qiao; Laura M Reyes; Yimei Zhu; Mostafa A El-Sayed; Chandra Veer Singh; Geoffrey A Ozin
Journal:  Proc Natl Acad Sci U S A       Date:  2016-11-28       Impact factor: 11.205

2.  Hybrid Oleate-Iodide Ligand Shell for Air-Stable PbSe Nanocrystals and Superstructures.

Authors:  J L Peters; J C van der Bok; J P Hofmann; D Vanmaekelbergh
Journal:  Chem Mater       Date:  2019-07-09       Impact factor: 9.811

3.  Optimizing Surface Chemistry of PbS Colloidal Quantum Dot for Highly Efficient and Stable Solar Cells via Chemical Binding.

Authors:  Long Hu; Qi Lei; Xinwei Guan; Robert Patterson; Jianyu Yuan; Chun-Ho Lin; Jiyun Kim; Xun Geng; Adnan Younis; Xianxin Wu; Xinfeng Liu; Tao Wan; Dewei Chu; Tom Wu; Shujuan Huang
Journal:  Adv Sci (Weinh)       Date:  2020-11-27       Impact factor: 16.806

4.  Novel post-synthesis purification strategies and the ligand exchange processes in simplifying the fabrication of PbS quantum dot solar cells.

Authors:  Anju Elsa Tom; Ajith Thomas; V V Ison
Journal:  RSC Adv       Date:  2020-08-20       Impact factor: 4.036

5.  The effect of water on colloidal quantum dot solar cells.

Authors:  Guozheng Shi; Haibin Wang; Yaohong Zhang; Chen Cheng; Tianshu Zhai; Botong Chen; Xinyi Liu; Ryota Jono; Xinnan Mao; Yang Liu; Xuliang Zhang; Xufeng Ling; Yannan Zhang; Xing Meng; Yifan Chen; Steffen Duhm; Liang Zhang; Tao Li; Lu Wang; Shiyun Xiong; Takashi Sagawa; Takaya Kubo; Hiroshi Segawa; Qing Shen; Zeke Liu; Wanli Ma
Journal:  Nat Commun       Date:  2021-07-19       Impact factor: 14.919

6.  Surface Traps in Colloidal Quantum Dots: A Combined Experimental and Theoretical Perspective.

Authors:  Carlo Giansante; Ivan Infante
Journal:  J Phys Chem Lett       Date:  2017-10-10       Impact factor: 6.475

7.  On the Colloidal Stability of PbS Quantum Dots Capped with Methylammonium Lead Iodide Ligands.

Authors:  Dmytro Bederak; Nataliia Sukharevska; Simon Kahmann; Mustapha Abdu-Aguye; Herman Duim; Dmitry N Dirin; Maksym V Kovalenko; Giuseppe Portale; Maria A Loi
Journal:  ACS Appl Mater Interfaces       Date:  2020-11-11       Impact factor: 9.229
  7 in total

北京卡尤迪生物科技股份有限公司 © 2022-2023.