Article
Chemistry, Inorganic & Nuclear
Carmen Coppola, Alessio D'Ettorre, Maria Laura Parisi, Lorenzo Zani, Gianna Reginato, Massimo Calamante, Alessandro Mordini, Maurizio Taddei, Riccardo Basosi, Adalgisa Sinicropi
Summary: A series of catechol-based sensitizers were presented for potential application in type II DSSCs. By analyzing the electronic and excited state properties of the dyes, it was found that introducing an ethylene spacer as a pi bridge enhances the charge transfer efficiency, regardless of electron-donating or electron-withdrawing substituents.
INORGANICA CHIMICA ACTA
(2021)
Article
Materials Science, Multidisciplinary
Dheeraj Devadiga, M. Selvakumar, Deepak Devadiga, Selvaraj Paramasivam, T. N. Ahipa, Prakasha Shetty, S. Senthil Kumar
Summary: Here, a metal-free organic dye (CCPICPB) with panchromatic absorption in the near-infrared range was synthesized. The dye's photophysical properties were studied and validated through experimental and theoretical simulation. Pristine and calcium-doped TiO2 microspheres were synthesized using a solvothermal approach. The performance of CCPICPB dye on these materials was evaluated, with the Ca-TiO2 photoanode-based device showing higher efficiency. Co-sensitization of CCPICPB dye with Ru(II) dye resulted in further efficiency improvement, attributed to improved V-OC and J(SC) due to the dye's compensatory effect and inhibition of electron recombination.
JOURNAL OF MATERIALS SCIENCE
(2023)
Review
Energy & Fuels
Dheeraj Devadiga, Muthu Selvakumar, Prakasha Shetty, Mysore Sridhar Santosh, Raghu Subash Chandrabose, Smagul Karazhanov
Summary: In the context of increasing population, the importance of renewable and sustainable energy alternatives is emphasized. Scientists are focusing on producing cost-effective and high-performance clean energy appliances to meet the growing demand. Dye-sensitized solar cells (DSSCs) are highlighted as a leading material in modern solar cell technologies, with metal-free organic dyes like carbazole (CZ), triphenylamine (TPA), and phenothiazine (PTZ) derivatives being identified as suitable alternatives to traditional complexes. This review primarily discusses the latest developments in using CZ, TPA, and PTZ scaffolds for DSSC applications, emphasizing the correlation between molecular design and photovoltaic performance. Adjusting the physical properties of devices through strategic sensitizer design can improve device performance, with photovoltaic parameters presented for all dyes and application insights on CZ, TPA, and PTZ-based dyes provided following a systematic review.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Ata Ur Rahman, Muhammad Bilal Khan, Muhammad Yaseen, Gul Rahman
Summary: The structure engineering of BODIPY organic dye has been rigorously studied to enhance light-harvesting efficiency in dye-sensitized solar cells. Rational design and modification of BODIPY-carbazole dyads using DFT calculations have led to significant reductions in band gap and improved photovoltaic performance with the incorporation of heterocyclic rings. Among the tested dyads, D1P exhibited the best performance with a high power conversion efficiency, short-circuit current density, and open-circuit voltage.
Article
Chemistry, Multidisciplinary
Xueyan Wang, Yuqing Wang, Jiazhi Zou, Jiaxin Luo, Chengjie Li, Yongshu Xie
Summary: In this work, organic concerted companion dyes CCOD-1 and CCOD-2 were successfully constructed and used in dye-sensitized solar cells. The CC dyes showed intense absorption and exhibited excellent photovoltaic performance with enhanced efficiency under different light sources.
Article
Chemistry, Applied
Yongjie Ding, Jianhua Li, Shuaishuai Liu, Yanfang Tan, Kaihang Shi, Yunfei Jiao, Baoxiu Mi, Wenjuan Xu, Zhiqiang Gao
Summary: Two new phenothiazine dyes CBPTZ-BTD1 and CBPTZ-BTD2 were designed and synthesized in this work, with CBPTZ-BTD2 showing higher dye loading and strengthened ICT effect compared to CBPTZ-BTD1, resulting in better photovoltaic performance.
Article
Chemistry, Physical
Ching-Chin Chen, Vinh Son Nguyen, Hsiao-Chi Chiu, Yan-Da Chen, Tzu-Chien Wei, Chen-Yu Yeh
Summary: New anthracene-bridged organic dyes CXC12 and CXC22 are designed and synthesized for high-efficiency dye-sensitized solar cells (DSSCs) under dim light. The addition of anthracene-acetylene group in CXC dyes extends the pi-conjugation of the molecules, resulting in improved absorption and molar extinction coefficient. Among the three anthracene-based dyes, CXC22 shows the most appropriate molecular structure for light harvesting and balancing dye loading and molecular aggregation, achieving a remarkable power conversion efficiency of 37.07% under dim-light conditions.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Margarita Buzancic Milosavljevic, Antonija Mravak, Martina Peric Bakulic, Vlasta Bonacic-Koutecky
Summary: In this study, the structural, optical, and photovoltaic properties of novel bio-nano hybrids (dye-nanocluster), along with a TiO2 surface model, are investigated for their application in dye-sensitized solar cells (DSSC). Specifically, a group of anthocyanidin dyes covalently bound to silver nanoclusters (NCs) with even or odd number of valence electrons were studied. The results show that the nanoclusters with an even number of valence electrons exhibit better acceptor properties in the hybrids. Additionally, the interaction between the bio-nano (dye-NC) hybrid and the TiO2 surface model was studied in terms of near-infrared absorption and charge separation. Overall, this theoretical study provides insights for the design of novel DSSCs based on bio-nano hybrids at the TiO2 surface.
Article
Chemistry, Physical
Yunfei Jiao, Shuaishuai Liu, Zhongjin Shen, Le Mao, Yongjie Ding, Dan Ren, Felix Thomas Eickemeyer, Lukas Pfeifer, Dapeng Cao, Wenjuan Xu, Juan Song, Baoxiu Mi, Zhiqiang Gao, Shaik M. Zakeeruddin, Wei Huang, Michael Gratzel
Summary: Heteroaromatic units are commonly used as pi-spacers for sensitizers in dye-sensitized solar cells. The type of pi-spacer strongly influences the solar to electric power conversion efficiency of organic dyes, with electron-rich pi-spacers leading to higher efficiency. Molecular engineering plays a crucial role in developing high efficiency organic dyes for DSSCs.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Physical
Tingxuan Wang, Xueliang Hao, Liang Han, Yujin Li, Qing Ye, Yanhong Cui
Summary: Three novel D-A-pi-A carbazole sensitizing dyes were synthesized with fluorenone as the auxiliary acceptor, benzene, furan and thiophene as pi bridge and cyanoacrylic acid as the anchoring acceptor, showing improved efficiency in photoelectric conversion. The introduction of different bridge groups affects the short-circuit current density and open-circuit voltage differently, with the dye containing a benzene bridge exhibiting the highest efficiency.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Physical
Samar Y. Al Name, Aisha Hossan
Summary: This study synthesized and characterized two novel metal-free dyes, MOS-1 and MOS-2, for use in dye-sensitized solar cells (DSSCs). The co-sensitization of MOS-1, MOS-2, and N719 showed the highest efficiency, attributed to broader absorption and efficient electron injection. The use of incident photon to current efficiency (IPCE) and electrochemical impedance spectroscopy (EIS) provided further insights into the photovoltaic enhancements.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jacqueline M. Cole, Ulrich F. J. Mayer
Summary: This feature article discusses the fundamental use of materials-characterization methods in determining the structural information of the dye-TiO2 interface in dye-sensitized solar cells (DSCs). It introduces various techniques for obtaining specific structural information on the interface, such as dye anchoring, dye aggregation, and molecular dye orientation. The article emphasizes the importance of acquiring such information for DSC design guidelines and the validation process of design-to-device pipelines.
Article
Environmental Sciences
Govind Sharma, Saurabh K. Saini, Komal Mulchandani, Amarnath Bheemaraju, Chhagan Lal
Summary: Natural dye-sensitized solar cells (DSSCs) are cost-effective and have a simple fabrication process. The choice of dyes significantly affects their performance. However, there is still a lack of comprehensive research on the photophysics and excited state dynamics of natural dyes used in DSSCs, highlighting the need for further investigation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Chemistry, Physical
Afsaneh Farokhi, Hashem Shahroosvand, Fatemeh Zisti, Melanie Pilkington, Mohammad Khaja Nazeeruddin
Summary: This comprehensive review focuses on the application of triphenylamines (TPAs), a prominent class of organic molecules, in dye-sensitized/organic solar cells. By exploring synthesis strategies for TPA derivatives, researchers have successfully improved the power conversion efficiencies of the cells and provided strong support for future commercial applications.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Omar Britel, Asmae Fitri, Adil Touimi Benjelloun, Ahmed Slimi, Mohammed Benzakour, Mohammed Mcharfi
Summary: The influence of different π-spacer groups on the efficiency of metal-free organic dyes in DSSCs was studied. Theoretical calculations showed that changing the π-spacer group can improve the performance of the dyes, including open-circuit photovoltage, light absorption ability, and intramolecular charge transfer properties.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Chemistry, Physical
Anupriya, K. R. Justin Thomas, Mangey Ram Nagar, Shahnawaz, Jwo-Huei Jou
Summary: Three new dipolar materials based on the phenanthroimidazole-imidazopyridine conjugated system were synthesized and characterized in this study, with changes in the position and number of phenanthmimidazole substituents. These derivatives exhibited superb thermal stability and high photoluminescence quantum yield. The red-shifted emission band was observed when the phenanthmimidazole chromophore was linked at the para-position of C2 phenyl ring in dyes.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Anupriya, K. R. Justin Thomas, Mangey Ram Nagar, Jwo-Huei Jou
Summary: In this study, four isomeric emitters based on imidazopyridine were synthesized and evaluated for their application in organic light-emitting diodes. The position of different units on the imidazopyridine core was found to significantly influence the optical and electroluminescence properties. The emitter with triphenylamine substituted on the para-position of the phenyl ring attached to the C2 of the imidazopyridine exhibited the longest wavelength emission maximum.
Review
Chemistry, Physical
Rajendra Kumar Konidena, K. R. Justin Thomas, Jong Wook Park
Summary: Organic synthesis is crucial for the development of innovative organic functional materials for optoelectronic applications. Carbazole, as a versatile building block, has shown great potential for use in organic electronics due to its unique features. Recent research has focused on the polyfunctionalization of carbazole and its effects on the properties of the resulting materials.
Article
Chemistry, Applied
Anupriya, K. R. Justin Thomas, Mangey Ram Nagar, Jwo-Huei Jou
Summary: High fluorescence efficiency and balanced charge transportation are desirable characteristics for organic emitters in OLED applications. This study focuses on D-A fluorophores containing CN-substituted 2-phenylimidazo[1,2-a]pyridine acceptor unit, which exhibit good fluorescence characteristics. The position of donors and cyano substituents were interchanged to obtain a series of isomers. These fluorophores showed high fluorescence quantum yield and excellent thermal stability. Excited-state solvatochromism and aggregation suppression were observed in the isomers due to the photo-induced intramolecular charge transfer. Doped devices with triphenylamine-containing dye showed excellent performance in terms of EQE, luminance, and CIE coordinates.
Article
Chemistry, Physical
A. Karuppusamy, Anuj Sharma, K. R. Justin Thomas, P. Kannan
Summary: In this study, three chalcone derivatives featuring pyrene chromophore were designed, synthesised, and investigated for their thermal, photophysical, and electrochemical properties. The results showed that these compounds exhibited specific absorption and emission characteristics, with the chalcone containing a nitro substituent displaying stronger intramolecular charge transfer. The solvatochromism of the chalcones and the aggregation-induced blue-shifted emission were also studied.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Applied
K. R. Justin Thomas, Abhishek Maurya, Mangey Ram Nagar, Jwo-Huei Jou
Summary: A new series of pyrene-based blue-emitting hybridized local and charge transfer materials is designed by asymmetrically substituting at the 1,3-positions of pyrene with phenanthroimidazole and N-phenylcarbazole. The dyes exhibit absorption due to pyrene localized and charge transfer from phenanthroimidazole to pyrene segments. Incorporation of carbazole enhances the charge transfer characteristics and leads to the hybridization of local and charge transfer states. These materials serve as emitting layers in both doped and non-doped multilayered organic light-emitting devices and exhibit deep-blue electroluminescence.
Article
Chemistry, Multidisciplinary
Anupam Das, K. R. Justin Thomas
Summary: This report demonstrates a light-promoted water-mediated NBS photoinitiated cleavage method for electron-deficient conjugated alkenes under mild and greener conditions via the hydrogen atom transfer mechanism. Additionally, this methodology is shown to work as a deprotection step for carbonyl groups. The protocol exhibits wide range of functional group tolerance and high regioselectivity at room temperature in an aqueous medium.
Article
Nanoscience & Nanotechnology
Gaurav Kumar Silori, Subashchandrabose Thoka, Kuo-Chuan Ho
Summary: The applicability of nanofillers in gel polymer electrolyte (GPE)-based devices has significantly increased in the past decade. However, the development of their applicability in GPE-based electrochromic devices (ECDs) has been limited due to challenges such as optical inhomogeneity, transmittance drop, and poor electrolyte fabrication methodologies. In this study, a reinforced polymer electrolyte tailored through PVDF-HFP, BMIMBF4, and various types of mesoporous SiO2 nanofillers was demonstrated to address these issues.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Anupam Das, K. R. Justin Thomas
Summary: This study demonstrates a visible-light-promoted catalyst-free condition for self-and cross-coupling reactions of thiols in an ambient atmosphere. It also accomplishes the synthesis of beta-hydroxysulfides under very mild conditions by forming an electron donor-acceptor (EDA) complex between a disulfide and an alkene. However, the direct reaction of thiol with alkene via the formation of a thiol-oxygen co-oxidation (TOCO) complex did not yield the desired compounds in high yields. The approaches presented in this paper for thiols coupling and beta-hydroxysulfides synthesis are unique and do not require toxic organic or metal catalysts.
Article
Nanoscience & Nanotechnology
Jin-Tin Lin, Chia-Sheng Huang, Cheng Ming Hui, Yu-Hong Liang, Luke The, Fang-Hsien Lu, Yun Chi, Sheng-Fu Wang, K. R. Justin Thomas, Jwo-Huei Jou
Summary: Nanoparticles can enhance the performance of optoelectronic devices, but their limited absorption bandwidth at around 520 nm restricts their effectiveness in the red region. However, this study demonstrates that a single nanoparticle based on nonprecious copper can significantly enhance the efficiency of LEDs of all colors, with an unprecedented wide absorption band.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Applied
K. R. Justin Thomas, Abhishek Maurya, Mangey Ram Nagar, Jwo-Huei Jou
Summary: In this study, three new pyrene-based deep blue emitting materials were designed and synthesized, which showed different emissions depending on the peripheral unit. These materials exhibited solvatochromic emission behavior and acidochromic properties, and were successfully applied in organic light-emitting diode devices with high external quantum efficiency and deep blue or cyan-blue color electroluminescence.
Article
Chemistry, Organic
Anupam Das, K. R. Justin Mohit, K. R. Justin Thomas
Summary: This study discovered a covalent organic framework that can cleave the (CC)-C-= bond of alkenes under light irradiation and convert them into their constituent carbonyl derivatives. The method is applicable for a wide range of alkenes and has high functional group tolerance and regioselectivity.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Fang-Sian Lin, Mani Sakthivel, Miao-Syuan Fan, Chien-Hsin Wu, Guan-Lun Fong, Jiang-Jen Lin, Ru-Jong Jeng, Kuo-Chuan Ho
Summary: By combining DPPTPTA and CuCoP/CNF, a modified layer DPPTPTA@CuCoP/CNF was prepared and applied to the CE of DSSCs. The modified layer exhibits good charge separation ability and catalytic activity, leading to excellent performance in terms of photoelectric conversion efficiency and stability.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Anupam Das, K. R. Justin Thomas
Summary: This report presents a sustainable and greener method for Knoevenagel condensation reaction using rose bengal as a photosensitizer in an aqueous medium. The protocol works smoothly for aromatic aldehydes and ketones containing both electron-donating and electron-withdrawing substituents.
Article
Materials Science, Multidisciplinary
Chia-Lin Yeh, Yi-June Huang, Han-Ting Chen, Hsin-An Tsai, Chun-Ting Li, Chuan-Pei Lee, Kuo-Chuan Ho
Summary: Different cobalt phosphide particles with various morphologies were successfully synthesized and phosphorized through a simple hydrothermal method. Hierarchical charge transfer routes were established in the phosphorized particles, showing promising potential for applications in dye-sensitized solar cells.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Organic
Geeta Devi Yadav, Pooja Chaudhary, Balaram Pani, Surendra Singh
Summary: Chiral transition metal complexes with privileged ligands are efficient catalysts for various asymmetric organic transformations. Transition metal complexes of C1-symmetric pyrrolidine-based ligands have been widely used in asymmetric organic reactions. However, a comprehensive review article on the transition metal complexes of chiral C1-symmetric pyrrolidine-based ligands derived from (L)-proline has not been published.
TETRAHEDRON LETTERS
(2024)
