Results 31 to 40 of about 1,147 (212)

Designed Lewis Acid–Base Passivation for High Performance Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
ABSTRACT Silicon's high cost and long energy payback time remain major barriers to the global expansion of solar power. In contrast, metal–halide perovskites offer abundant, solution‐processable absorbers, and have achieved efficiencies of 25%–30%, positioning them as strong competitors to silicon.
Afna Manaf, Hiba Shahulhameed, Bhabani Sankar Swain, Shengzhong (Frank) Liu, Adel Najar   +4 more
wiley   +1 more source

Recent Progress in the Isolation and Bioactivities of Carbazole Alkaloids

Natural Product Communications
Objective/Background Carbazole derivatives have a tricyclic skeleton, consisting of a central pyrrole ring fused with two benzene rings. Carbazole derivatives are an important class of nitrogen-containing heterocyclic compounds that are widely found in ...
Duc Dau-Xuan, Chung Nguyen-Thi, Dung Vo-Cong   +2 more
doaj   +1 more source

Photophysical and Electro-Optical Properties of Copolymers Bearing Blue and Red Chromophores for Single-Layer White OLEDs

Nanomaterials, 2021
In this study, novel copolymers consisting of blue and red chromophores are presented to induce emission tuning, enabling the definition of white light emission in a single polymeric layer. These aromatic polyether sulfones exhibit high molecular weights,
Despoina Tselekidou, Kyparisis Papadopoulos, Vasileios Kyriazopoulos, Konstantinos C. Andrikopoulos, Aikaterini K. Andreopoulou, Joannis K. Kallitsis, Argiris Laskarakis, Stergios Logothetidis, Maria Gioti   +8 more
doaj   +1 more source

Unified Analytical Framework for Understanding the Operational Stability of Blue Phosphorescent OLEDs: Quantitative Insights Into Exciton Recycling and Bimolecular Interactions

Advanced Functional Materials, EarlyView.
Blue phosphorescent OLEDs remain limited by poor operational stability. Here, a unified analytical framework integrating transient photoluminescence and magneto‐electroluminescence is developed to correlate intrinsic material photophysics with electrically driven degradation.
Hakjun Lee, Bum June Park, Taekyung Kim
wiley   +1 more source

Preparation and property analysis of antioxidant of carbazole derivatives

BMC Chemistry
Carbazole derivatives can be used as antioxidants in the lubricating oil industry. The alkylation of carbazole with 2-chloro-2-methylpropane and 2-bromopropane catalyzed by anhydrous aluminum chloride was studied.
Zhi-quan Zhang, Bao-wei Zhu, Jing-yu Zhang, Hong Chen   +3 more
doaj   +1 more source

1-[6-(9H-Carbazol-9-yl)hexyl]-2-phenyl-1H-benzimidazole

Acta Crystallographica Section E, 2009
The molecule of the title compound, C31H29N3, contains a hexyl chain, a coordination unit (benzimidazole) and a functional group (carbazole). The benzimidazole ring is not coplanar with either the phenyl ring or the carbazole system, making dihedral ...
Jing Meng, Tian-Zhi Yu, Yu-Ling Zhao
doaj   +1 more source

Role of the Recombination Zone in Organic Light‐Emitting Devices

Advanced Materials, EarlyView.
This review summarizes the critical role of the recombination zone in organic light‐emitting diodes (OLEDs). We highlight that broadening the recombination zone in OLEDs based on emissive layers with balanced charge transport and high photoluminescence quantum yields provides a promising route toward achieving both long operational lifetime and high ...
Yungui Li, Karl Leo
wiley   +1 more source

Synthesis and Properties of Alternating Vinylene- Benzothiadiazole-Based Copolymers with Carbazole and Fluorene Derivatives for Photovoltaic Applications

International Journal of Electrochemical Science, 2014
Three vinylene-benzothiadiazole based alternating copolymers with carbazole, 3,6-difluoro carbazole and fluorene were prepared via Suzuki coupling polymerisation in the presence of catalytic amounts of palladium (II) acetate Pd(OAc)2 and tri-ortho ...
Ali Mohammed Alsalme, Abdulaziz Ali B. Alghamdi, Ammar Abdul Ghani Q. Alhamdani, Ahmed Iraqi   +3 more
doaj   +1 more source

Acridine Based Small Molecular Hole Transport Type Materials for Phosphorescent OLED Application

Molecules, 2021
Two small molecular hole-transporting type materials, namely 4-(9,9-dimethylacridin-10(9H)-yl)-N-(4-(9,9-dimethylacridin-10(9H)-yl)phenyl)-N-phenylaniline (TPA-2ACR) and 10,10′-(9-phenyl-9H-carbazole-3,6-diyl)bis(9,9-dimethyl-9,10-dihydroacridine) (PhCAR-
Ramanaskanda Braveenth, Keunhwa Kim, Il-Ji Bae, Kanthasamy Raagulan, Bo Mi Kim, Miyoung Kim, Kyu Yun Chai   +6 more
doaj   +1 more source

Self‐Assembled Monolayers in p–i–n Perovskite Solar Cells: Molecular Design, Interfacial Engineering, and Machine Learning–Accelerated Material Discovery

Advanced Materials, EarlyView.
This review highlights the role of self‐assembled monolayers (SAMs) in perovskite solar cells, covering molecular engineering, multifunctional interface regulation, machine learning (ML) accelerated discovery, advanced device architectures, and pathways toward scalable fabrication and commercialization for high‐efficiency and stable single‐junction and
Asmat Ullah, Ying Luo, Stefaan De Wolf
wiley   +1 more source