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EditorialAdvanced Hybrid Functional Materials for Energy Applications
Iftikhar Ali Sahito ,1 Chengyu Hong ,2 and Sung Hoon Jeong3
1Department of Textile Engineering, Mehran University of Engineering and Technology, Jamshoro 76060, Pakistan2Department of Civil Engineering, Shanghai University, Shanghai 200444, China3Department Organic and Nano Engineering, Hanyang University, Seoul, Republic of Korea
Correspondence should be addressed to Iftikhar Ali Sahito; [email protected]
Received 14 October 2018; Accepted 14 October 2018; Published 30 December 2018
Copyright © 2018 Iftikhar Ali Sahito et al. This is an open access article distributed under the Creative Commons AttributionLicense, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work isproperly cited.
This special issue is intended to present and discuss recentchallenges and technological advancement in developmentand recent research trends for the use of functional nanoma-terials and their application in energy harvesting and energystorage devices and to understand the science of the recentlydeveloped functional nanomaterials for energy applications.This special issue gives an insight into the functional mate-rials having potential application in the energy harvestingand storage including the materials used for the recentlydeveloped perovskite solar cells. A good number of paperswere submitted, and after a thorough peer review process,six papers were selected to be included in this special issue.
The included papers cover important applications ofnanomaterials for energy application, including in quantumdot solar cells, perovskite solar cells, optoelectrical propertiesof fullerene derivatives, phase change behavior of carbonderivatives, stabilization of electrospun nanofiber mats, andself-ordered void formation in silicon dioxide. We believethat the original work published in this special issuehighlights the contemporary topics in research related tofunctional nanomaterials in energy applications and willfamiliarize readers to the latest advances in the field.
The paper by K. Mukai and Y. Ishida presents a signifi-cant improvement in the characteristics of organic solar cellson Si substrates using quantum dot (QD) superlattices pre-pared by sedimentation. They discovered that the PbS QDgrains grew into a large superlattice when the deposition pro-ceeded for a long period of time. They also revealed that whenthe deposition is slow, the short-circuit current density of thesolar cell doubles compared with the rapid deposition case.
The paper by N. Radychev et al. presents an investigationof two donor-acceptor copolymers based in the view ofphotovoltaic application. They revealed that the resultingcopolymers exhibit strong absorption in the visible regionwith a similar band gap of about 2.2 eV and applying an opti-mization procedure, a power conversion efficiency of 4.6% isshown to have been achieved for the PC71BM solar cells.
The paper by T.-P. Teng et al. presents a novel carbon-based nanofluids (CBNFs) with the minimized carbonmaterials (MCMs), prepared using a graphite-powder-based heating and cooling processing method (GP-HCPM),with improved stability. Their results revealed that theCBNFs tend to increase the thermal conductivity k, viscosity,and density values but reduce the specific heat values of thesamples, compared with water.
The paper by L. Sabantina et al. presents first tests ofstabilizing PAN/gelatin nanofibers, depicting the impact ofdifferent stabilization temperatures and heating rates on thechemical properties as well as the morphologies of the result-ing nanofiber mats. They discovered that like the stabiliza-tion of pure PAN, a stabilization temperature of 280°Cseems suitable. Also, compared to stabilization of purePAN nanofiber mats, approximately double heating ratescan be used for PAN/gelatin blends without creating unde-sired conglutinations.
The paper by J. Lim et al. presents CH3NH3PbI3perovskite-sensitized solid state solar cells with the use of dif-ferent polymer hole transport materials and showed that thedevice with a spiro-OMeTAD-based hole transport layershows the highest efficiency of 6.9%. Interestingly, the
HindawiJournal of NanomaterialsVolume 2018, Article ID 7814784, 2 pageshttps://doi.org/10.1155/2018/7814784
PTB7 polymer, which is considered an electron donormaterial, showed dominant hole transport behaviors in theperovskite solar cell.
The paper by B. Pivac et al. presents the annealing behav-ior of very thin SiO2/Ge multilayers deposited on Si substrateby e-gun deposition. They showed that after annealing at800°C, in inert atmosphere, Ge is completely out-diffusedfrom the SiO2 matrix leaving small (about 3 nm) sphericalvoids embedded in the SiO2 matrix. These voids areformed at distances governed by the preexisting multilayerstructure (in vertical direction) and self-organization (inhorizontal direction).
Conflicts of Interest
We, the guest editorial team of the special issue, declare thatwe do not have any conflict of interest or private agreementswith companies.
Acknowledgments
We would like to thank all the authors who contributed tothis special issue and the experts who gave the scientificreviews with their expertise in due time, giving us a criticaland constructive feedback.
Iftikhar Ali SahitoChengyu Hong
Sung Hoon Jeong
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