Article
Chemistry, Physical
Se-Phin Cho, Hyun-Jung Lee, Yu-Jin Kang, You-Hyun Seo, Seok-In Na
Summary: By introducing a bi-functional additive with different functional groups, the passivation effect on the defects of perovskite films is enhanced, leading to improved efficiency and stability of solar cells.
APPLIED SURFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Wenqiang Ma, Huanhuan Zhang, MingXin Hu, Yingnan Guo, Lin Yang
Summary: The synthesis of CsPbBr3 nanocrystals (NCs) in nonpolar solvents at room temperature has advanced significantly in recent years. However, the use of toluene in most strategies hinders their large-scale production due to toxicity concerns. In this study, a facile and environmentally friendly method using n-hexane as the solvent was proposed for the synthesis of CsPbBr3 NCs. The use of Didecyldimethylammonium bromide (DD10AB) effectively passivates the NCs, improving colloidal stability. The treated CsPbBr3 NCs with DD10AB exhibited a narrow emission, high PLQY, and retained their structure and luminescence after extended storage. The use of DD10AB-CsPbBr3 film in LCD displays showed a high color gamut, indicating potential for future liquid crystal display applications.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Chun-Hao Chen, Zhen-Huang Su, Yan-Hui Lou, Yan-Jun Yu, Kai-Li Wang, Gen-Lin Liu, Yi-Ran Shi, Jing Chen, Jun-Jie Cao, Liang Zhang, Xing-Yu Gao, Zhao-Kui Wang
Summary: This article discusses a full-dimensional grain boundary stress release strategy for flexible perovskite indoor photovoltaics. By using borax as a 3D crosslinking agent, the mechanical and phase stabilities of the perovskite films are improved. The fabricated devices show high conversion efficiencies under indoor conditions.
ADVANCED MATERIALS
(2022)
Article
Engineering, Environmental
Ji Hyeon Lee, Benjamin Nketia-Yawson, Jae-Joon Lee, Jea Woong Jo
Summary: In this study, an ionic liquid surface modifier was used to passivate the perovskite layer in order to achieve efficient harvesting of light energy in perovskite photovoltaics. The results showed that the ionic liquid effectively reduced surface traps and improved the efficiency of perovskite photovoltaics by approximately 15%. However, using an excess amount of the ionic liquid resulted in the formation of perovskite-ionic liquid complexes and inefficient charge transport and extraction.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Zeynab Skafi, Jie Xu, Vahid Mottaghitalab, Leila Mivehi, Babak Taheri, Farshad Jafarzadeh, Suresh Kumar Podapangi, Davide Altamura, Maria Rachele Guascito, Luisa Barba, Cinzia Giannini, Aurora Rizzo, Francesca De Rossi, Hamed Javanbakht Lomeri, Luca Sorbello, Fabio Matteocci, Francesca Brunetti, Thomas M. Brown
Summary: Flexible perovskite solar cells on PET films show high efficiency and stability. The efficiency is improved by anion mixing and interfacial engineering, reaching up to 32.5% at 1000 lx. The stability is significantly increased with treatment. These cells enable seamless integration with various electronic devices.
Article
Chemistry, Multidisciplinary
Haiying Zheng, Guozhen Liu, Weiwei Wu, Huifen Xu, Xu Pan
Summary: By utilizing 1-MIm and 1-MBIm as interfacial passivation agents, the performance and stability of perovskite solar cells have been significantly improved. The strong passivation effect of 1-MBIm and its interaction with water molecules contribute to the enhanced photovoltaic performance and long-term stability of the devices, offering an efficient strategy for commercial application.
Article
Multidisciplinary Sciences
Kwanchai Penpong, Chaowaphat Seriwatanachai, Atittaya Naikaew, Napan Phuphathanaphong, Ko Ko Shin Thant, Ladda Srathongsian, Thunrada Sukwiboon, Anuchytt Inna, Somboon Sahasithiwat, Pasit Pakawatpanurut, Duangmanee Wongratanaphisan, Pipat Ruankham, Pongsakorn Kanjanaboos
Summary: Perovskite materials are promising for next-generation solar devices. Researchers configured a triple-cation perovskite material with appropriate bromide and chloride content to achieve an optimum band gap. They used antisolvent deposition and vacuum thermal annealing to fabricate high-quality perovskite films, resulting in devices with high power conversion efficiency and open-circuit voltage.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
Chenyang Guo, Zaozao Qiu, Zuowei Xie
Summary: Carboranes, three-dimensional analogues of benzene, have wide applications and the recent development of transition-metal-catalyzed cage B-H functionalization allows for vertex-specific functionalization, providing valuable insights for future multifunctionalization of carboranes.
Article
Chemistry, Multidisciplinary
Kai-Li Wang, Haizhou Lu, Meng Li, Chun-Hao Chen, Ding-Bo Zhang, Jing Chen, Jun-Jie Wu, Yu-Hang Zhou, Xue-Qi Wang, Zhen-Huang Su, Yi-Ran Shi, Qi-Sheng Tian, Yu-Xiang Ni, Xing-Yu Gao, Shaik M. Zakeeruddin, Michael Gratzel, Zhao-Kui Wang, Liang-Sheng Liao
Summary: Amino naphthalene sulfonates polar molecules are used to functionalize the TiO2 substrate, with strong ion-dipole interaction between molecules and the ionic perovskite film, resulting in high-quality CsPbI3 films. These films exhibit defect-immunity and large shunt resistance under low light conditions, enabling high-efficiency indoor photovoltaic devices.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Jing Chen, Yan-Hui Lou, Kai -Li Wang, Di Xue, Guang-Peng Zhu, Chun-Hao Chen, Yu -Han Li, Tao Wang, Li-Zhen Huang, Zhao-Kui Wang, Liang-Sheng Liao
Summary: Efficient carrier extraction and transport in perovskite photovoltaics are enhanced by a proper heterojunction formed at the interface. The film quality of perovskites in n-i-p devices is influenced by the interface between the electron transport layer and perovskite layer. This study introduces the concept of back surface field technique into the front surface of perovskite photovoltaics by adding a potent n-type molecular buffer layer (2,6-naphthalene dicarboxylic acid) at the interface to optimize the energy band arrangement and improve interface contact, resulting in a high open-circuit voltage and a power conversion efficiency of up to 24.19%.
Article
Chemistry, Physical
Chong Dong, Jing Chen, Chun-Hao Chen, Yi-Ran Shi, Wen-Fan Yang, Kai-Li Wang, Zhao-Kui Wang, Liang-Sheng Liao
Summary: By introducing 3,4-ethoxylene dioxy thiophene (EDOT) into the anti-solvent, annealing-free perovskite films with enlarged crystal grains and reduced defects can be achieved, promoting the development of low-cost flexible perovskite photovoltaics.
Article
Chemistry, Multidisciplinary
Seongchan Kim, Sae Byeok Jo, Tae Keun Yun, Sol Lee, Kwanpyo Kim, Young Jin Choi, Joohoon Kang, Jeong Ho Cho
Summary: This work demonstrates a simple, rapid, and widely applicable strategy for the direct synthesis and printing of well-aligned nanowire arrays on a large scale. The synthesized nanowire arrays undergo systematic investigation and comprehensive structural and optical analyses. The fabrication strategy is shown to be superior and applicable through the use of a single nanowire photodetector and 2D image recognition.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Ziyu Wang, Xuejie Zhu, Jiangshan Feng, Chenyu Wang, Cong Zhang, Xiaodong Ren, Shashank Priya, Shengzhong (Frank) Liu, Dong Yang
Summary: A complexed ZnO material (E-ZnO) was developed as an improved electron selective layer in perovskite solar cells, showing higher electron mobility and better energy level matching compared to traditional ZnO. By utilizing E-ZnO and a new perovskite film fabrication process without annealing or antisolvent, the highest efficiency of 20.39% was achieved for PSCs. Additionally, unencapsulated PSCs with E-ZnO maintained 95% of their initial efficiency after exposure to ambient atmosphere for 3604 hours.
Article
Chemistry, Multidisciplinary
Fei Zhang, Haipeng Lu, Bryon W. Larson, Chuanxiao Xiao, Sean P. Dunfield, Obadiah G. Reid, Xihan Chen, Mengjin Yang, Joseph J. Berry, Matthew C. Beard, Kai Zhu
Summary: Surface modification with a new compound, Me-PDAI(2), on standard perovskite thin films can induce the formation of a thin perovskitoid surface layer, leading to improved efficiency and stability of the solar cells.
Article
Nanoscience & Nanotechnology
Luyu Cao, Si-Min Gu, Bomei Liu, Lin Huang, Jian Zhang, Yiwen Zhu, Jing Wang
Summary: A facile room-temperature co-precipitation method using ethanol solvent and salicylic acid additive is proposed for synthesizing highly stable cubic phase CsSnBr3 perovskite. The protection effect of ethanol and salicylic acid prevents oxidation of Sn(2+) and stabilizes the perovskite material. The synthesized CsSnBr3 perovskite exhibits exceptional stability under moist air conditions.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Eunhak Lim, Jiyoung Heo, Xinxing Zhang, Kit H. Bowen, Sang Hak Lee, Seong Keun Kim
Summary: The study reveals that small anionic metal clusters (Cu, Ag, and Au) can activate CO2 and form a complex with it, providing a new insight for the catalytic conversion of CO2 on metal surfaces.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Hongki Kim, Jong Woo Lee, Gi Rim Han, Yu Jin Kim, Su Hwan Kim, Seong Keun Kim, Sang Kyu Kwak, Joon Hak Oh
Summary: Efficient band bending and defect engineering at the interface between perovskite and indium tin oxide (ITO) were achieved using a binary additive system with CuSCN and GlyHCl in simplified HTL-free mixed Pb-Sn perovskite solar cells. The optimized band alignment with the addition of GlyHCl improved hole extraction efficiency, resulting in a high efficiency of up to 20.1% under forward bias without hysteresis.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Jung Bae Son, Jooyoun Kang, Sohyeon Bae, Key Young Yang, Jongseok Han, Kyung Suk Min, Changhee Lee, Soohwan Sul, Seong Keun Kim
Summary: The irreversible loss of emission intensity in organic light-emitting diode (OLED) devices after extended operation is a significant issue in OLED technology and industry. A new method for in situ, layer-specific analysis of OLED devices demonstrates the predominant role of bleaching in influencing OLED performance.
Article
Chemistry, Multidisciplinary
Hongki Kim, Ryeong Myeong Kim, Seok Daniel Namgung, Nam Heon Cho, Jung Bae Son, Kijoon Bang, Mansoo Choi, Seong Keun Kim, Ki Tae Nam, Jong Woo Lee, Joon Hak Oh
Summary: Chiral organic ligand-incorporated low-dimensional metal-halide perovskites with chiral plasmonic gold nanoparticles demonstrate remarkable chirality in the near-infrared region and high sensitivity for self-powered NIR detection.
Article
Multidisciplinary Sciences
Junyeop Lee, Keewon Sung, So Young Joo, Jun-Hyeon Jeong, Seong Keun Kim, Hyunsook Lee
Summary: The dynamic interaction between BRCA2 and telomeric G-quadruplex (G4) plays a crucial role in telomere replication. Binding of BRCA2 remodels telomeric G4 structure, allowing the restart of stalled replication forks driven by G4 and preventing telomere breakdown.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Seok Daniel Namgung, Ryeong Myeong Kim, Yae-Chan Lim, Jong Woo Lee, Nam Heon Cho, Hyeohn Kim, Jin-Suk Huh, Hanju Rhee, Sanghee Nah, Min-Kyu Song, Jang-Yeon Kwon, Ki Tae Nam
Summary: This study demonstrates a highly efficient CPL-detecting transistor using chiral plasmonic nanoparticles and a conducting oxide. The transistor successfully distinguishes circular polarization state and exhibits high photoresponsivity. This research contributes to the rational design and fabrication of high-performance CPL detectors and opto-neuromorphic operations.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Hongki Kim, Gi Rim Han, Seong Keun Kim, Taecheon Lyu, Wonbin Choi, Jong Woo Lee, Joon Hak Oh
Summary: The rapid development of organic-inorganic hybrid perovskites has met the demand for advanced solar power generation. We observed strong band-filling in FA(0.5)MA(0.5)Pb(0.5)Sn(0.5)I(3) polycrystal-line films under continuous-wave excitation, which is more evident than that in typical MAPbI(3). Based on this finding, we proposed a novel electronic barrier adaptive concentrator-type photovoltaic system achieved by inserting an electronic barrier-inducing indene-C-60 bisadduct layer (ICBA). Under concentrated illumination, the potential barrier between FA(0.5)MA(0.5)Pb(0.5)Sn(0.5)I(3) and ICBA significantly decreases, resulting in a higher fill factor and power conversion efficiency of 17.0% compared to the reference device (15.6%). Our study provides a proof-of-concept demonstration of a novel photovoltaic system utilizing the photophysical property of perovskites.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Gi Rim Han, Eunhak Lim, Jooyeon Kang, Doyk Hwang, Jiyoung Heo, Seong Keun Kim, Jong Woo Lee
Summary: The excited-state proton transfer (ESPT) reaction is an important photochemical process, and alcoholic solvent-mediated ESPT studies play a significant role in photoacid-based reactions. This study investigates the optical properties of resveratrone, a unique dye with promising optical characteristics, and finds evidence for the involvement of alcoholic solvent-mediated ESPT in its radiative properties.
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Chemistry, Physical
Doyk Hwang, Liam M. Wrigley, Micah Lee, Andrzej L. Sobolewski, Wolfgang Domcke, Cody W. Schlenker
Summary: By analyzing the excited-state intermolecular proton-coupled electron-transfer reaction, the resultant heptazinyl reactive radical species on a picosecond time scale were identified. Detailed spectroscopic characterization of the hydrogen-bonded intermolecular complex provided product absorption signatures which were assigned to the hydrogenated TAHz radical. The findings will contribute to future analysis of heptazine and carbon nitride photochemistry and can be utilized for designing improved PCET-based photochemical systems.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Chemistry, Multidisciplinary
Sanghun Yeou, Jihee Hwang, Jaehun Yi, Cheolhee Kim, Seong Keun Kim, Nam Ki Lee
Summary: Cytosine methylation has contrasting effects on DNA mechanics, increasing the stiffness of weakly bent dsDNA while promoting kink formation under strong bending.
Article
Chemistry, Multidisciplinary
Jiwon Jung, Seon Yong Kim, Seong Keun Kim
Summary: In this study, we investigated the effects of temperature, pH, and RNA residue on the stepwise enzyme kinetics of 10-23 deoxyribozyme at the single-molecule level. Our findings suggest that temperature and pH significantly affect the enzymatic reaction, while different RNA residues specifically impact the cleavage step.
