73025-93-1Relevant articles and documents
Effects of meta or para connected organic dyes for dye-sensitized solar cell
Jiao, Yunfei,Mao, Le,Liu, Shuaishuai,Tan, Tianwen,Wang, Donglin,Cao, Dapeng,Mi, Baoxiu,Gao, Zhiqiang,Huang, Wei
, p. 165 - 174 (2018)
Two novel phenothiazine-based organic dyes have been designed and synthesized as sensitizers for dye-sensitized solar cell (DSSC). In these dyes, we have employed carbazole as donor, phenothiazine as π-bridge, and rhodanine acetic acid as acceptor. For comparison, a benzene group has been introduced as the π-linker between carbazole donor and phenothiazine π-bridge with meta or para connection mode. Using the dye with the para-connected method, the DSSC devices exhibited higher power conversion efficiency of 5.57% than those based on dye with meta-connection mode (4.56%). The improved performance mainly came from better short-circuit photocurrent current. Photophysical, electrochemical, theoretical calculations and electrochemical impedance spectroscopy have been further investigated to disclose corresponding device mechanisms.
Panchromatic quasi-solid-state squaraine dye sensitized solar cells enhanced by F?rster resonance energy transfer of DCM-pyran
Yun, Hyeong Jin,Jung, Dae Young,Lee, Do Kyoung,Jen, Alex K.-Y.,Kim, Jae Hong
, p. 675 - 681 (2015)
The panchromatic operation of quasi-solid state dye sensitized solar cells is one of the most important criteria for enhancing the performance of solar cells. This paper presents a novel strategy for designing efficient panchromatic quasi-solid state dye sensitized solar cells that are enhanced by F?rster resonance energy transfer. 4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran is excited by the irradiation of visible light with a short wavelength, and the excited energy is then transferred to a blue organic photosentizer, symmetrically structured squaraine. The addition of 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran to the quasi-solid electrolyte improves the photovoltaic performance of squaraine-sensitized solar cells. The optimized quasi-solid state dye sensitized solar cell exhibits approximately 1.8 times higher overall conversion efficiency than the solar cell without any fluorescence materials. In particular, the photocurrent is enhanced significantly at the absorption wavelength range of 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran, which means that the panchromatic quasi-solid state dye sensitized solar cell has been designed successfully.
Using phenoxazine and phenothiazine as electron donors for second-order nonlinear optical chromophore: Enhanced electro-optic activity
Liu, Fenggang,Wang, Haoran,Yang, Yuhui,Xu, Huajun,Yang, Dan,Bo, Shuhui,Liu, Jialei,Zhen, Zhen,Liu, Xinhou,Qiu, Ling
, p. 196 - 203 (2015)
Two novel chromophores based on the phenoxazine (chromophore L1) or phenothiazine (chromophore L2) donor, and tricyanofuran acceptors linked together via thiophene as the bridges have been synthesized and systematically investigated. Cyclic voltammetry measurements showed that chromophore L1 had smaller energy gap than chromophore L2 due to the stronger electron-donating ability. Moreover, Density functional theory calculations suggested that the β value of chromophore L1 is 17% larger than that of chromophore L2. The doped film containing the chromophore L1 showed an r33 value of 49 pm/V at the concentration of 25 wt% which is two times higher than the EO activity of the chromophore L2 (23 pm/V) and the traditional aryl chromophore (10-20 pm/V). High r33 value, high thermal stability (onset decomposition temperatures higher than 220 °C) suggests the potential use of the new chromophore in nonlinear optical materials.
Organic Nanoprobe Cocktails for Multilocal and Multicolor Fluorescence Imaging of Reactive Oxygen Species
Yin, Chao,Zhu, Houjuan,Xie, Chen,Zhang, Lei,Chen, Peng,Fan, Quli,Huang, Wei,Pu, Kanyi
, (2017)
Hypochlorite (ClO?) as a highly reactive oxygen species not only acts as a powerful “guarder” in innate host defense but also regulates inflammation-related pathological conditions. Despite the availability of fluorescence probes for detection
The comparative study of new carboxylated 1,3-indanedione sensitizers with standard cyanoacetic acid dyes using co-adsorbents in dye-sensitized solar cells
Jeong, Hyeonjun,Chitumalla, Ramesh Kumar,Kim, Dong Woo,Vattikuti, S.V. Prabhakar,Thogiti, Suresh,Cheruku, Rajesh,Kim, Jae Hong,Jang, Joonkyung,Koyyada, Ganesh,Jung, Jae Hak
, p. 84 - 90 (2019)
Two new carboxylated 1,3-indanedione sensitizers (MPhe-ind and BPhe-ind) were synthesized and their dye-sensitized solar cells (DSSC) performance were compared with the corresponding standard cyanoacetic acid sensitizers (MPhe-cn and BPhe-cn). The carboxylated 1,3-indanedione sensitizers have shown almost 100 nm enhanced absorption curves compared to the cyanoacetic acid dyes with an extended IPCE curve up to 800 nm. Despite greater absorption and electrochemical properties, the synthesized dyes showed moderate efficiencies (2.10% and 2.67%) than standard dyes. The low electron injection efficiency and recombination of carboxylated 1,3-indanedione might be responsible for low efficiency. Detailed investigation studies have been performed and complemented with the theoretical studies.
Characterisation of a series of triarylmethane dyes as light harvesters for photo-electrochemical systems
Ng, Chun Hin,Andr?? Ohlin,Winther-Jensen, Bjorn
, p. 110 - 119 (2015)
A series of commercially available dyes were characterised by electrochemical, spectroscopic and computational methods. Several dyes, including Fuchsin Basic and Malachite Green were found to have properties that make them potential candidates for use in photo-electrochemical systems. The risks of combining different characterisation methods are also highlighted, namely the combination of thermodynamic reactions (electrochemical redox reactions), electronic transitions (optical spectroscopy) and the use of computational techniques to describe them.
Porphyrin bearing phenothiazine pincers as hosts for fullerene bindingviaconcave-convex complementarity: synthesis and complexation study
Chitta, Raghu,Duvva, Naresh,Giribabu, Lingamallu,Jain, Kanika,Roy, Tapta Kanchan
supporting information, p. 19691 - 19703 (2021/11/12)
In this work, we synthesized free base porphyrin hosts,m-(PTZ)4-H2Pandp-(PTZ)4-H2P, that are functionalized with four phenothiazine moieties at themeso-positionviaa flexible ethoxy phenyl linker. The rigid and n
New phenothiazine dyes containing benzothiadiazole-acceptor for dye-sensitized solar cells
Ding, Yongjie,Gao, Zhiqiang,Jiao, Yunfei,Li, Jianhua,Liu, Shuaishuai,Mi, Baoxiu,Shi, Kaihang,Tan, Yanfang,Xu, Wenjuan
, (2021/07/31)
In this work, we designed and synthesized two new phenothiazine dyes CBPTZ-BTD1 and CBPTZ-BTD2, which employed the electron-accepting moiety of benzothiadiazole (BTD). The structural difference between the two new dyes is due to the presence of an ethynyl unit between BTD and the benzoic acid. With respect to its congener CBPTZ-BTD1, CBPTZ-BTD2 with the insertion of ethynyl group shows a more coplanar molecular skeleton, which endows CBPTZ-BTD2 with a higher dye loading and a strengthened ICT effect, resulting in a red-shifted ICT absorption with a higher molar extinction coefficient. Besides, CBPTZ-BTD2 has a longer electron lifetime in comparation with CBPTZ-BTD1 without the linear ethynyl unit, as reveled by OCVD and EIS measurements. Therefore, CBPTZ-BTD2 exhibits a better photovoltaic performance with an enhanced JSC of 14.04 mA cm?2 and VOC of 0.82 V, leading to an improved PCE of 7.33 %.
