Article
Polymer Science
Ravi Prakash, Santanu Das, Pralay Maiti
Summary: Functionalization of multi-walled carbon nanotubes (CNTs) was conducted to obtain CNT-tagged polyurethane (PU-CNT) through ultrasonication, chemical attachment, and chain extension. Spectroscopic techniques confirmed the functionalization of CNTs and polymer and thermal measurements revealed improved thermal stability and conductivity. Quantum dots of CuInS2 were synthesized and characterized for potential use in solar cells. Solar cell devices with Au as counter electrode achieved an enhanced power conversion efficiency of 0.81% due to reduced electron-hole pair recombination and improved hole transportation.
Article
Nanoscience & Nanotechnology
Yukai Ma, Yunong Zhang, Ming Liu, Tongliga Han, Yanlai Wang, Xiaojing Wang
Summary: In this study, Zn-CuInS2 and CuInS2 quantum dots were synthesized by heat injection method for their application as photosensitizers in quantum dot sensitized solar cells. It was found that Zn doping expands the optical absorption range, enhances luminescence intensity, and improves electron injection efficiency. The Zn-CuInS2 QDSCs exhibit high conversion efficiency and short circuit current density under AM 1.5G illumination.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Chemistry, Physical
S. Liu, R. Fan, Y. Zhao, M. Yu, L. Li, Q. Li, B. Liang, W. Zhang
Summary: In this study, a relatively less toxic CISSe quantum dot was prepared by an organic high-temperature hot injection method for use in QD-sensitized solar cells. Through Sn doping and ZnS passivation, the electron collection efficiency was improved and charge recombination was inhibited, resulting in a power conversion efficiency of 6.7% for the QDSSC.
MATERIALS TODAY ENERGY
(2021)
Article
Electrochemistry
Akash S. Rasal, Chiranjeevi Korupalli, Girum Getachew, Tzung-Han Chou, Ting-Ying Lee, Anil V. Ghule, Jia-Yaw Chang
Summary: The study introduces novel nature-inspired biopolymer polydopamine (PDA)-based additives to polysulfide electrolytes, achieving efficient and stable quantum dot-sensitized solar cells (QDSSCs). The PDA-based additives not only boost conversion efficiencies but also greatly enhance device performance stability, possibly due to the antioxidative property of PDA neutralizing light-induced radicals.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Wei Wang, Yiling Xie, Fangfang He, Yuan Wang, Weinan Xue, Yan Li
Summary: In quantum dot-based solar cells (QDSCs), the balance between QD loading and TiO2 film thickness significantly affects the performance. A relatively thin photoanode prepared by a cationic surfactant-assisted multiple deposition procedure achieved a high QD loading comparable to that of the commonly used thick photoanode. Under optimized conditions, the Zn-Cu-In-Se and Zn-Cu-In-S based QDSCs showed a comparable power conversion efficiency (PCE) to those with significantly thicker photoanodes (over 25.0 μm).
GREEN ENERGY & ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Akash S. Rasal, Khalilalrahman Dehvari, Girum Getachew, Chiranjeevi Korupalli, Anil Ghule, Jia-Yaw Chang
Summary: Modifying conservative polysulfide electrolytes with polymer additives such as sulfur-rich graphitic carbon nitride (SGCN) can enhance the photovoltaic performance of quantum dot sensitized solar cells (QDSSCs), particularly improving short-circuit current and fill factors. The efficiency of QDSSCs is increased by the additives, possibly due to the electron-rich surface of SGCN hindering electron-hole recombination and facilitating the reduction of S-n(2-) to S2- redox couple more efficiently.
Article
Energy & Fuels
Bui Van Thang, Ha Thanh Tung, Dang Huu Phuc, Tan Phat Nguyen, Tran Van Man, Lam Quang Vinh
Summary: This study investigated the application of reduced graphene oxide bonded to Cu2S nanoparticles as the material for a counter electrode in quantum dot sensitized solar cell fabrication. The FTO@rGO-Cu2S counter electrodes demonstrated the highest power conversion efficiency and the lowest counter electrode/electrolyte interface resistance, indicating superior electrochemical properties of the rGO-Cu2S material.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Chemistry, Physical
Maryam Ostadebrahim, Hossein Dehghani
Summary: In this study, the influence of ZnS, ZnSe, and ZnSxSe1-x layers in CdSexS1-x quantum dot based solar cells was systematically investigated, with ZnS and ZnS0.2Se0.8 identified as the optimal choices. The designed QDSSCs with these layers showed a significantly higher efficiency compared to bare QDSSCs.
APPLIED SURFACE SCIENCE
(2021)
Review
Chemistry, Physical
Akash S. Rasal, Sudesh Yadav, Anil A. Kashale, Ali Altaee, Jia-Yaw Chang
Summary: This review discusses the factors influencing the performance stability of QDSSCs and provides insights into the mechanisms causing degraded performances. It also presents cutting-edge strategies for improving the overall performance stability of QDSSCs.
Article
Chemistry, Physical
Aryal Krishna Prasad, In-Rok Jo, Soon-Hyung Kang, Kwang-Soon Ahn
Summary: A novel electrochemical method was used to synthesize rGO-Cu2S as a counter electrode for quantum-dot-sensitized solar cell applications. Compared to Pt and Cu2S counter electrodes, rGO-Cu2S displayed lower charge transfer resistance and higher electrocatalytic activity, leading to an improved power conversion efficiency in QDSSCs.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Yanli Shi, Xiaowen Zhou, Yuan Lin, Jianguang Jia
Summary: This paper investigates the influence of surface passivation on the performance of quantum dot sensitized solar cells (QDSSCs). The results show that using a ZnS/ZnSe double passivation layer can effectively inhibit charge recombination and significantly improve the conversion efficiency of the cells.
Article
Materials Science, Multidisciplinary
Zhuoyin Peng, Wen Luo, Chengtang Long, Yue Wang, Yilong Fu
Summary: In this study, a CuxS/GO composite hole transport layer is used to modulate the charge transfer efficiency of quantum dot-sensitized solar cells. The introduction of the CuxS/GO composite layer significantly reduces the normalized PL intensity of TiO2/CuInS2 photo-electrodes, indicating excellent charge separation properties. The charge recombination traps are also reduced under the CuxS/GO composite layer, leading to an effective improvement in the charge transfer efficiency of the solar cells. As a result, TiO2/CuInS2 quantum dot-sensitized solar cells with the CuxS/GO composite layer exhibit higher V-oc, FF and J(sc) values, resulting in an enhancement of the photovoltaic conversion efficiency from 4.85% to 6.07%.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Inorganic & Nuclear
Qiu Zhang, Lu Jin, Yuekun Zhang, Tingting Zhang, Fengyan Li, Lin Xu
Summary: By utilizing SiW11Co-doped high-efficiency Cu2S/SiW11Co counter electrode, the performance of quantum dot-sensitized solar cells has been significantly enhanced, including improved stability and electrocatalytic activity. Additionally, adding an appropriate amount of SiW11Co can inhibit charge recombination and further improve cell performance.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Physical
Bin Bin Jin, Hui Sheng Huang, Shu Ying Kong, Guo Qing Zhang, Biao Yang, Chu Xing Jiang, Ya Zhou, Dan Jun Wang, Jing Hui Zeng
Summary: In this study, ATO/PbSe composite was designed as the counter electrode for QDSSCs, showing enhanced electrocatalytic activity and stability compared to PbSe CE obtained by PVD. The improved performance is attributed to the high specific surface area, permeability, conductivity, and interface connectivity of ATO/PbSe CE, providing more active sites for reduction and fast channels for ion diffusion and electron transport. As a result, the CdS QDSSCs and CdS/CdSe co-sensitized QDSSCs assembled with ATO/PbSe CE exhibited higher power conversion efficiency than PbSe CE obtained by PVD, with stable photovoltaic properties over 200 minutes.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Gagandeep, Mukhtiyar Singh, Ramesh Kumar, Vinamrita Singh, Sunita Srivastava
Summary: Simulation studies were conducted to investigate the performance of CuInS2 quantum dot (CIS QD) in different structures of perovskite solar cells (PSCs). By optimizing the thickness of absorber layers and electron transporting layers, the highest power conversion efficiency was achieved in a specific cell structure. The impact of defect density in the absorber layer and cell structure interface on PSC performance was also analyzed. Additionally, the effects of operating temperature, metal contact work function, and resistance were examined.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
A. S. Rasal, Y-H Chen, K. Dehvari, G. Getachew, P-J Tseng, K. Waki, S. Bela, J-Y Chang
Summary: This study reported the preparation of a gel electrolyte using XG and TiO2 NPs to improve the performance of QDSSCs, achieving higher photoconversion efficiencies and stability. XG exhibited thixotropic sol-gel transitions, and the incorporation of TiO2 NPs improved the ionic conductivity of the gel electrolyte, passivating surface trap states or acting as steric hindrance.
MATERIALS TODAY ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Girum Getachew, Chiranjeevi Korupalli, Akash S. Rasal, Worku Batu Dirersa, Mochamad Z. Fahmi, Jia-Yaw Chang
Summary: For the first time, red-emitting CsMgxPb1-xI3 quantum dots were prepared by doping with magnesium ions, showing excellent optical properties and outstanding biocompatibility. By encapsulating into PF127-Gd micelles, the bioavailability of the quantum dots was improved. Overall, this study proposes a novel strategy to enhance the optical properties, stability, and bioapplicability of quantum dots.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Biomedical
Novi Irmania, Khalilalrahman Dehvari, Jia-Yaw Chang
Summary: In this study, a new set of multifunctional chalcogenide quantum dots was synthesized via a one-pot microwave-assisted hydrothermal reaction, and their potential applications in dual-modal imaging and therapy were demonstrated.
JOURNAL OF BIOMATERIALS APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Akash S. Rasal, Ting-Ying Lee, Pei-Yun Kao, Girum Gatechew, Aswandi Wibrianto, Worku Batu Dirersa, Anil Ghule, Jia-Yaw Chang
Summary: In this study, a simple and direct approach was used to develop high-quality counter electrode films for quantum dot-sensitized solar cells. By combining metallic copper chalcogenides with S, N dual-doped carbon sources, the resulting films demonstrated improved photovoltaic performance.
Article
Chemistry, Multidisciplinary
W. B. Dirersa, G. Getachew, C. -H Hsiao, A. Wibrianto, A. S. Rasal, C. -C. Huang, J. -Y. Chang
Summary: This study reported the ROS-mediated therapies of CuFeS2 nanoparticles, which showed good efficacy in photothermal, photodynamic, and chemodynamic therapies. Furthermore, the nanoparticles were used for drug delivery to enhance chemotherapy. The results demonstrated the potential of these nanoparticles as anticancer agents.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Physical
Aswandi Wibrianto, Girum Getachew, Worku Batu Dirersa, Akash S. Rasal, Chih-Ching Huang, Tzu-Chun Kan, Jungshan Chang, Jia-Yaw Chang
Summary: Clinical studies have shifted to multimodal therapy due to the complexity and unpredictability of malignant tumors. This study presents a one-pot microwave synthesis of highly fluorescent copper, nitrogen, and sulfur-doped carbon quantum dots (Cu,N,S-CQDs) with superior quantum yield and enhanced peroxidase-like activity. These Cu,N,S-CQDs were further biofunctionalized with glucose oxidase (GOx) and camptothecin (CPT) to form a multifunctional nanocatalyst for cancer therapy. The Cu,N,S-CQDs@GOx/CPT nanocatalyst demonstrated multiple therapeutic mechanisms, including chemodynamic therapy, gas therapy, starvation therapy, and chemotherapeutic mechanisms.
Article
Energy & Fuels
Rutuja A. Chavan, Gokul P. Kamble, Sarika B. Dhavale, Akash S. Rasal, Sanjay S. Kolekar, Jia-Yaw Chang, Anil Vithal Ghule
Summary: MXene composites with different metal oxides have shown good electrochemical performance and hinder restacking of MXene. In this study, nickel oxide@MXene (NO@MXene) composites with varying compositions were synthesized and used as an anode for a supercapacitor. The 15% NO@MXene composite electrode demonstrated the highest capacitance, and an all-solid-state asymmetric supercapacitor with 15% NO@MXene as the anode displayed good cyclic stability and high energy and power densities.
Article
Chemistry, Multidisciplinary
Yao-Sheng Cheng, Yu-Ting Wu, Sofiannisa Aulia, Ching-Cheng Chang, Mia Rinawati, Ting-Ying Lee, Jia-Yaw Chang, Ni Luh Wulan Septiani, Brian Yuliarto, Min-Hsin Yeh
Summary: A quantum dot-sensitized solar cell (QDSSC) with cobalt manganese sulfide (CMS) composites as counter electrodes (CE) exhibits improved activity and stability. By controlling the precursor ratio of Co and Mn, the bimetallic CMS can be adjusted to manipulate the Sn2- reduction activity. The optimized CMS CEs also demonstrate a high solar-to-electricity conversion efficiency of 5.88 +/- 0.19% under 100 mW cm-2 irradiation, indicating their superior reduction activity to Sn2-.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Livy Laysandra, Girum Getachew, Jai-Rui Chang, Jia-Yaw Chang, Yu-Cheng Chiu
Summary: Achieving polymer nanocomposites with improved elasticity and stable mechanical and fluorescence properties remains challenging. However, the grafting from method coupled with reversible fragment-added chain transfer polymerization shows promise for the preparation of flexible and fluorescent nanocomposite films.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Physical
Worku Batu Dirersa, Girum Getachew, Aswandi Wibrianto, Akash S. Rasal, Vivek S. Gurav, Mochamad Zakki Fahmi, Jia-Yaw Chang
Summary: The development of multifunctional nano-therapies has improved cancer treatment by enhancing therapeutic performance and minimizing side effects. In this study, a drug-loaded nanocarrier was designed for multimodal cancer therapy using MoOxS2-x quantum dots. The nanocarrier demonstrated efficient catalytic activity for chemodynamic treatment, reactive oxygen species-mediated therapies, and photodynamic therapy. It also exhibited excellent drug-loading efficiency and biocompatibility, resulting in significant cancer cell death through various therapeutic mechanisms.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Polymer Science
Tzu-Chi Chiang, Jia-Yaw Chang, Tzung-Han Chou
Summary: This study successfully prepared stable nanoemulsions of curcumin by adjusting the HLBt using Tween 60. The addition of Tween 60 reduced the size of the nanoemulsions and improved their storage stability. Higher HLBt values resulted in higher encapsulation efficiency and enhanced remaining activity of curcumin.
Article
Nanoscience & Nanotechnology
Worku Batu Dirersa, Tzu-Chun Kan, Girum Getachew, Aswandi Wibrianto, Sonjid Ochirbat, Akash Rasal, Jungshan Chang, Jia-Yaw Chang
Summary: Iron-containing Fenton nanocatalysts have shown great potential for clinical use due to their effective antitumor activity and low toxicity. In this study, FeMnOx nanoparticles were synthesized using cation exchange to enhance Fenton reactions in the tumor microenvironment, leading to improved chemodynamic therapy and chemotherapy. The nanoparticles exhibited excellent therapeutic potential, as demonstrated in in vitro and animal studies.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Materials Science, Multidisciplinary
Girum Getachew, Aswandi Wibrianto, Akash S. Rasal, Shamsa Kizhepat, Worku Batu Dirersa, Vivek Gurav, Jia-Yaw Chang
Summary: This article presents an in-depth investigation of lead-free perovskite material quantum dots (LFPMs QDs) as photocatalysts. LFPMs show promising performance in various photocatalysis applications, including water splitting, CO2 reduction, pollutant degradation, and organic synthesis. The formation of heterojunction nanocomposites using LFPMs and co-catalysts or hole-transporting materials enhances their photocatalytic performance. The article also discusses the advantages and drawbacks of LFPMs photocatalysts and proposes future research directions.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Wulan Purnamasari, Titah Aldila Budiastanti, Aminatun Aminatun, Ulfa Rahmah, Sri Sumarsih, Jia-Yaw Chang, Mochamad Zakki Fahmi
Summary: The present study investigated the effect of graphene oxide in cellulose acetate-based composite nanofibers on the transdermal delivery of naproxen. The addition of graphene oxide promoted the production of nanofibers with smaller diameter, higher conductivity, and higher mechanical strength, resulting in higher naproxen release from the nanofibers. The composite nanofiber also exhibited antibacterial activity and accelerated naproxen release at neutral pH, showing potential for wound healing applications.
Article
Nanoscience & Nanotechnology
Girum Getachew, Chiranjeevi Korupalli, Akash S. Rasal, Worku Batu Dirersa, Mochamad Z. Fahmi, Jia-Yaw Chang
Summary: This study reports the preparation of red-emitting CsMgxPb1-xI3 quantum dots (QDs) and their biofunctionalization into gadolinium-conjugated pluronic 127 micelles (PQD@Gd) for dual-modal imaging and photodynamic therapeutic properties. The PQD@Gd nanoagents exhibit superior MR contrasting effects and have potential applications in cancer therapy and organic pollutant removal. Additionally, the PQD@Gd nanoagents demonstrate excellent photocatalytic activity towards organic pollutants under visible light irradiation, showcasing their multifunctionality.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)
