Fast Review Process in Established Journals is Not a Flaw

Journal article

Authors/Editors

SOMCHAI WONGWISES

Strategic Research Themes

No matching items found.

Publication Details

Author list: Mahian O., Kasaeian A., Wongwises S.

Publisher: Elsevier

Publication year: 2019

Journal: Solar Energy (0038-092X)

Volume number: 25

Issue number: 4

Start page: 1255

End page: 1256

Number of pages: 2

ISSN: 0038-092X

eISSN: 1471-1257

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85074105539&doi=10.1016%2fj.solener.2019.10.024&partnerID=40&md5=7507225ec53d5127f3df15dde4dc7b36

Languages: English-Great Britain (EN-GB)

View in Web of Science | View on publisher site | View citing articles in Web of Science

Abstract

Immobilizing quantum dots on an electron transport layer (ETL) is a very crucial step in the fabrication of quantum dot sensitized solar cells (QDSSC). Post-synthesis assembly of quantum dots (QDs) via aliphatic linkers has limited the device performance because of low and non-uniform coverage of QD sensitizers. This can result in intermediate surface trap states increasing the probability of exciton recombination. Therefore, we have designed a bi-phenyl aromatic linker 4′-mercapto-biphenyl-4′carboxylic acid (MBCA) that tethers QDs and ETL efficiently via [sbnd]SH and [sbnd]COOH groups respectively. The designed linker has enhanced the overall power conversion efficiency due to its interminable conjugation, and a favourable molecular orbital distribution inducing better electron injection rate. To enhance the photon collection efficiency and to apprehend the compatibility of QDs, cascading heterostructure of CdS/CdSe QDSSC devices were fabricated. The ligand linkage was confirmed via molecular spectroscopy (NMR and ATR-IR spectroscopy) and there performance studies like IV, IPCE, capacitance-voltage and impedance measurements were carried out. These studies clearly substantiates the augmentation of electron injection rate attributed to conjugated molecular bridges, assisting shift of fermi level of TiO2 and quick electron tunnelling. © 2019 International Solar Energy Society

Keywords

Aromatic linkers, CdS, CdSe, Colloidal quantum dot solar cells, Conjugated molecular bridges