Cited 0 time in webofscience Cited 3 time in scopus

Monodisperse Perovskite Colloidal Quantum Dots Enable High-Efficiency Photovoltaics

Title
Monodisperse Perovskite Colloidal Quantum Dots Enable High-Efficiency Photovoltaics
Authors
Lim, SeyeongLee, GyudongHan, SanghunKim, JigeonYun, SunheeLim, JongchulPu, Yong JinKo, Min JaePark, TaihoChoi, JongminKim, Younghoon
DGIST Authors
Lim, Seyeong; Lee, Gyudong; Han, Sanghun; Kim, Jigeon; Yun, Sunhee; Lim, Jongchul; Pu, Yong Jin; Ko, Min Jae; Park, Taiho; Choi, Jongmin; Kim, Younghoon
Issue Date
2021-05
Citation
ACS Energy Letters, 6(6), 2229-2237
Type
Article
Keywords
Conversion efficiencyEfficiencyGel permeation chromatographyIon beamsLead compoundsNanocrystalsOpen circuit voltagePerovskitePurificationQuantum chemistryQuantum efficiencyPhotovoltaic performancePower conversion efficienciesSize selectionSynthetic routesPerovskite solar cellsSemiconductor quantum dotsSolsVolcanic rocksCarrier transportPhotoluminescence quantum yieldsColloidal quantum dotsFull widths at half maximumsHigh-efficiency
ISSN
2380-8195
Abstract
Bandtail broadening originating from increasing the polydispersity of colloidal quantum dots (CQDs) deteriorates open-circuit voltage (VOC) and hinders charge-carrier transport in CQD photovoltaics. The development of colloidal synthetic routes has enabled preparing monodisperse perovskite CQDs (Pe-CQDs) that have attracted attention as promising absorbers in CQD photovoltaics. However, polar-antisolvent-based purification induces the dissolution and agglomeration of Pe-CQDs, resulting in an irregular size distribution. Consequently, the photovoltaic performance decreases because of the increase in Pe-CQD polydispersity. Here, we demonstrate the preparation of well-purified monodisperse CsPbI3-Pe-CQDs via size selection on the basis of gel permeation chromatography. Well-purified monodisperse Pe-CQDs exhibit improved photovoltaic performance and achieve a low Pe-CQD polydispersity. Furthermore, these Pe-CQDs show higher photoluminescence quantum yields, narrower full-widths at half-maximum, and lower Urbach energies, in comparison to irregular-sized Pe-CQDs without size selection. Therefore, CsPbI3-Pe-CQD solar cells comprising monodisperse Pe-CQDs show the highest power conversion efficiency (15.3%) and VOC (1.27 V) among the fully inorganic CsPbI3-Pe-CQD solar cells reported so far. © 2021 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/15446
DOI
10.1021/acsenergylett.1c00462
Publisher
American Chemical Society
Related Researcher
  • Author Choi, Jongmin Chemical & Energy Materials Engineering (CEME) Laboratory
  • Research Interests Advanced Metal Oxides; Colloidal Quantum Dots; Perovskite-Quantum Dot Hybrid Nanomaterials; Photocatalytic Materials
Files:
There are no files associated with this item.
Collection:
Department of Energy Science and EngineeringChemical & Energy Materials Engineering (CEME) Laboratory1. Journal Articles
Division of Energy Technology1. Journal Articles


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE