Article
Chemistry, Multidisciplinary
Zhi-Quan Wei, Shuo Hou, Shi-Cheng Zhu, Yang Xiao, Gao Wu, Fang-Xing Xiao
Summary: This study introduces a new design of electron-tunneling photosystems using transition metal chalcogenides quantum dots and insulating polymer-metal oxides, demonstrating enhanced efficiency for solar-driven photoelectrochemical water oxidation.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
G. Nagaraj, Mustafa K. A. Mohammed, Masoud Shekargoftar, P. Sasikumar, P. Sakthivel, G. Ravi, M. Dehghanipour, Seckin Akin, Ahmed Esmail Shalan
Summary: This study introduces a method of using graphene quantum dots to modify the SnO2/ZnO layer to enhance the performance of perovskite solar cells, significantly improving opto-electronic properties and increasing power conversion efficiency. Devices with the modified electron transport layer show higher open-circuit voltage and long-term stability.
MATERIALS TODAY ENERGY
(2021)
Article
Chemistry, Multidisciplinary
S. Akhil, R. Geetha Balakrishna
Summary: Cu-based ternary chalcogenides, specifically CuBiSe2 quantum dots, show promising potential as low-cost and eco-friendly alternatives to heavy-metal based photosensitizers. They possess optimal bandgap, high photoresponsivity, and photostability. This work investigates their application as photoabsorber materials for solar cells, achieving a satisfactory power conversion efficiency of 2%. A further increase in efficiency up to 2.6% is observed with the formation of a heterostructure CuBiSe2/CuBiS2. This research provides insights into the electronic structure and dynamics of Cu-based selenium quantum dots, significantly impacting future research in optoelectronic applications.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
D. Vinoth Pandi, V. Saraswathi, M. R. Venkatraman, N. Muthukumarasamy, S. Agilan, D. Velauthapillai, K. Brindhadevi, A. Pugazhendhi
Summary: PbS quantum dots and PbS quantum dots-sensitized ZnO nanostructures with rod-like shape were successfully synthesized. The prepared PbS quantum dots exhibited significant visible light absorption, and the light absorption of PbS quantum dots-sensitized ZnO nanorods was higher than that of bare ZnO nanorods. The uniform development of rod-like ZnO nanostructures with deposition of PbS quantum dots on the surface was observed from electron microscope images. The solar cells made using PbS quantum dots-sensitized ZnO nanorods achieved a power conversion efficiency of 1.2%.
MATERIALS TODAY CHEMISTRY
(2023)
Review
Chemistry, Physical
Miguel Albaladejo-Siguan, Elizabeth C. Baird, David Becker-Koch, Yanxiu Li, Andrey L. Rogach, Yana Vaynzof
Summary: Colloidal quantum dot solar cells (QDSCs) show great potential in energy conversion efficiency, but their stability under sunlight exposure needs improvement. This review focuses on the degradation mechanisms and stability improvement strategies of three classes of QDs, proposing a methodology for characterizing QDSCs' stability.
ADVANCED ENERGY MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Mei Wang, Ruoyue Fan, Huating Bo, Zhengwang Cheng, Wei Zou, Jing He, Xinguo Ma
Summary: The photovoltaic performance of mesoscopic perovskite solar cells was improved by loading ZnO or TiO2 quantum dots into the mesoporous TiO2 layer. The efficiency of ZnO-modified cells increased while that of TiO2-modified cells decreased. This is because ZnO modification led to larger perovskite grains, enhanced light absorption and electron transport, and reduced recombination, while TiO2 aggregation decreased the specific surface area of the electron transport layer.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Hao Fu, Junsen Zhang, Yanhao Li, Li Gong, Haiping He, Zhishan Fang, Conghua Zhou, Jianlin Chen, Jincheng Fan
Summary: In order to improve the low photoelectric conversion efficiency of HTL-free, carbon-based all-inorganic perovskite solar cells (PSCs), we introduced a clean interfacial engineering method using deionized water (DI) spin-coating on F-doped SnO2 (FTO) to obtain a compact and highly uniform ZnO film. By adding excess CsBr to CsPbI3 precursor solution, stable black phase CsPbI3 was obtained and HTL-free, carbon-based all-inorganic CsPbI3-xBrx (x < 1) perovskite solar cells were fabricated. The champion PCE was improved from 10.95% to 12.39%.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Rohit D. Chavan, Malgorzata Wolska-Pietkiewicz, Daniel Prochowicz, Maria Jedrzejewska, Mohammad Mahdi Tavakoli, Pankaj Yadav, Chang Kook Hong, Janusz Lewinski
Summary: A novel approach of low-temperature processed pure ZnO electron-transport layer (ETL) using stabilized ZnO quantum dots as easily removable solvent molecules was reported, leading to efficient and stable perovskite solar cells (PSCs).
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Haihong Niu, Cunlong Fang, Xiantao Wei, Huan Wang, Lei Wan, Yuan Li, Xiaoli Mao, Jinzhang Xu, Ru Zhou
Summary: This work utilized magnetron sputtering to deposit ZnO ETL for PSCs with improved device performance and efficiency, achieving a PCE of 13.04%. A bilayer ZnO/SnO2 ETL was designed to enhance electron extraction efficiency, resulting in an increased PCE of 15.82% with reduced hysteresis.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Physical
Ahmed Esmail Shalan, Erdi Akman, Faranak Sadegh, Seckin Akin
Summary: In this study, the introduction of glutaric acid as a passivation molecule for perovskite solar cells improves efficiency and long-term stability by enhancing crystal growth, electronic properties, and reducing charge recombination. This approach achieved a champion-stabilized efficiency of nearly 22% with minimal hysteresis and considerable operational stability after aging.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
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
Mohammad Mahdi Tavakoli, Hadi Tavakoli Dastjerdi, Pankaj Yadav, Daniel Prochowicz, Huayan Si, Rouhollah Tavakoli
Summary: Highly efficient and stable monolithic perovskite/PbS quantum dots tandem solar cells are reported, with a single cell PSC achieving a maximum PCE of 22.15% and QD devices with an improved open-circuit voltage and a PCE of 8.46%. Tandem devices with stabilized PCEs of 17.1% and 21.1% are achieved, with the 2T tandem device showing the highest efficiency reported in the literature for this design and excellent operational stability over 500 hours under continuous illumination.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Energy & Fuels
Rabia Bashir, Muhammad Kashif Bilal, Amna Bashir, Awais Ali
Summary: Lead selenide quantum dots (PbSe QDs) possess remarkable features due to their adjustable bandgap and low-temperature synthesis. In addition to the efficient QDs active layer, the electron transport layer (ETL) also plays a significant role in achieving high-efficiency colloidal quantum dots solar cells (CQDSCs). Undoped and 1-3% lithium-doped zinc oxide (LZO) sol-gel is introduced as an ETL and incorporated into CQDSCs to achieve high efficiency. The results show that 2 wt% Li-doping in ZnO ETL significantly improves the conduction band minimum and transmittance, while reducing oxygen defect densities and film roughness compared to other ETLs. Furthermore, PbSe CQDSCs with 2 wt% Li-doped ZnO ETL demonstrate the highest power conversion efficiency (PCE) of 10.80%, which is 7.5% higher than ZnO-based PbSe CQDSCs. Similarly, LZO-based PbSe CQDSCs with 2 wt% Li-doping exhibit long-term stability for approximately 40 days. Li-doping in ZnO offers a promising approach for low-cost, high-performance CQDSCs.
Review
Materials Science, Multidisciplinary
Sundar Singh, Zishan H. Khan, Mohd Bilal Khan, Pramod Kumar, Pragati Kumar
Summary: This review presents an overview of the technology of QDSSCs and discusses the role of metal chalcogenide (MCh) QDs as sensitizers. Lead (Pb)-based QDs have better sensitizing properties but suffer from stability and toxicity issues. Therefore, this review focuses on Cd-based QDs (CdSe and CdTe) and provides a perspective on recent trends in CdSe- and CdTe-based QDSSCs research.
BULLETIN OF MATERIALS SCIENCE
(2022)
Review
Chemistry, Physical
Shi-Cheng Zhu, Fang-Xing Xiao
Summary: Transition metal chalcogenides quantum dots (TMCs QDs) are promising light-harvesting antennas for solar energy conversion, due to their large absorption coefficient, abundant active sites, and quantum confinement effect. In this review, the physicochemical properties and synthesis methodologies of TMCs QDs (e.g., CdS QDs, CdSe QDs, CdTe QDs) are elucidated. Various modification strategies for enhancing the photocatalytic water splitting performances of TMCs QDs are introduced, including co-catalyst loading, heterojunction engineering, element doping, and plasmonic metal photosensitization. Moreover, recent advances in photocatalytic hydrogen generation using TMCs QDs are discussed, including sacrificial reagents, Z-scheme photosystems, one-step excitation photosystems, and photosensitizers. The future outlook and challenges for TMCs QDs-dominated photocatalysis are highlighted.
Article
Chemistry, Multidisciplinary
Yong Woong Jun, Taejun Wang, Sekyu Hwang, Dokyoung Kim, Donghee Ma, Ki Hean Kim, Sungjee Kim, Junyang Jung, Kyo Han Ahn
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2018)
Article
Chemistry, Physical
Wonseok Lee, Seunghwa Hong, Sungjee Kim
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Chemistry, Multidisciplinary
Wonseok Lee, Juwon Oh, Woosung Kwon, Sang Hyeon Lee, Dongho Kim, Sungjee Kim
Article
Chemistry, Physical
Wonseok Lee, Doowon Choi, Sungjee Kim
CHEMISTRY OF MATERIALS
(2020)
Article
Multidisciplinary Sciences
Yongju Kwon, Juwon Oh, Eunjae Lee, Sang Hyeon Lee, Anastasia Agnes, Gyuhyun Bang, Jeongmin Kim, Dongho Kim, Sungjee Kim
NATURE COMMUNICATIONS
(2020)
Correction
Multidisciplinary Sciences
Yongju Kwon, Juwon Oh, Eunjae Lee, Sang Hyeon Lee, Anastasia Agnes, Gyuhyun Bang, Jeongmin Kim, Dongho Kim, Sungjee Kim
NATURE COMMUNICATIONS
(2021)
Review
Materials Science, Multidisciplinary
Yongju Kwon, Sungjee Kim
Summary: This paper reviews the synthesis, characterization, and applications of InP magic-sized clusters (MSCs) as intermediates in the growth of InP quantum dots (QDs). It discusses tools for characterizing MSCs, the incorporation of heterogeneous atoms in InP MSCs, developments in InP QDs syntheses, and growth mechanisms mediated by MSCs.
NPG ASIA MATERIALS
(2021)
Article
Biochemical Research Methods
Gyudong Lee, Jaejung Song, Hyunsoo Han, Donghoon Kwon, Joonhyuck Park, Sangmin Jeon, Sanghwa Jeong, Sungjee Kim
Summary: This paper demonstrates the fabrication of silica-shell-coated magnetic nanoparticle clusters (SMNCs) and subsequent surface engineering to produce zwitterionic and primary amine ligands on SMNCs. The hydrodynamic size and zeta potential of SMNC-ZW/Am can be flexibly tuned by controlling the relative amounts of zwitterionic and primary amine ligands. SMNC-ZW/Am shows higher colloidal stability and reduced nonspecific adsorption compared to bare SMNC, making it a potential antifouling nanosubstrate for separation and bioanalysis.
BIOCONJUGATE CHEMISTRY
(2021)
Article
Chemistry, Physical
Hyunmi Doh, Juwon Park, Jiwon Bang, Sanghwa Jeong, Wonseok Lee, Ho Jin, Sungjee Kim
Summary: Cation exchange (CE) is a method that can convert the chemical composition of nanocrystals while preserving their size, shape, and crystal phase. In this study, CE reactions in a porous nanostructure of supra-quantum dots (SQDs) were investigated and found to exhibit ultrafast and complete reactions, with a rate comparable to that of smaller quantum dots (QDs). The conservation of size and shape in SQDs after CE reactions suggests the presence of internal voids that compensate for lattice constant changes. The results also indicate that the interaction between external cations and the internal surface of SQDs accelerates the CE reaction.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Yunmo Sung, Wonseok Lee, Eunjae Lee, Young Ho Ko, Sungjee Kim
Summary: The surface atom stoichiometry of Ag2S NCs is controlled through ion-pair ligand-assisted surface reactions. Different combinations of cation and anion pairs are studied, leading to the synthesis of cation-rich-surfaced, anion-rich-surfaced, and perfectly stoichiometric Ag2S NCs. The ion-pair-assisted surface chemistry enables the enhancement of fluorescence intensity and epitaxial growth performance of Ag2S NCs.
CHEMISTRY OF MATERIALS
(2022)
Correction
Chemistry, Physical
Hyunmi Doh, Juwon Park, Junhwa Lee, Jiwon Bang, Sanghwa Jeong, Wonseok Lee, Ho Jin, Sungjee Kim
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Hyunmi Doh, Wonseok Lee, Yunmo Sung, Sungjee Kim
CHEMICAL COMMUNICATIONS
(2020)
Article
Materials Science, Multidisciplinary
Yongju Kwon, Gyuhyun Bang, Jeongmin Kim, Anastasia Agnes, Sungjee Kim
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
Article
Chemistry, Multidisciplinary
Mihye Lim, Wonseok Lee, Gyuhyun Bang, Woo Jin Lee, Youngrong Park, Yongju Kwon, Yebin Jung, Sungjee Kim, Jiwon Bang
Article
Nanoscience & Nanotechnology
Bomi Kim, Kangwook Kim, Yongju Kwon, Woojin Lee, Weon Ho Shin, Sungjee Kim, Jiwon Bang
ACS APPLIED NANO MATERIALS
(2018)