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Understanding perceived color through gradual spectroscopic variations in electrochromism / S. Mishra [et al.] // Indian J. Phys. - 2019. - Vol. 93, Is. 7. - P. 927-933, DOI 10.1007/s12648-018-1353-7. - Cited References: 34. - Authors acknowledge financial support from the Department of Science and Technology (DST), Govt. of India. Authors are thankful to Dr. K. V. Adarsh (IISER Bhopal) for Raman measurements. Authors thank Prof. V.D. Vankar (IIT Delhi) for useful discussions. Authors (AC and DKP) are thankful to MHRD and CSIR (Govt. of India), respectively, for providing fellowships. Support received from DST under FIST scheme (grant number: SR/FST/PSI-225/2016) is also acknowledged.
. - ISSN 0973-1458. - ISSN 0974-9845
Перевод заглавия: Понимание воспринимаемого цвета через постепенные спектроскопические изменения в электрохромизмеРУБ Physics, Multidisciplinary
Рубрики:
3 REDOX FORMS
TUNGSTEN-OXIDE
RAMAN-SPECTRA
VIOLOGEN
SALTS
Кл.слова (ненормированные):
Viologen -- Raman spectroscopy -- Electrochromism -- UV-Vis
Аннотация: A bias-dependent in situ Raman scattering and UV–Vis absorption spectroscopic change has been correlated with the corresponding color change of an electrochromic device in an attempt to explain how to understand the relationship between actual perceived color and its absorption/transmittance spectra. For this, the bias across an electrochromic device was increased gradually, rather than abruptly turning ON and OFF, to see subtle variations in Raman and absorption spectra due to bias. Raman scattering establishes that viologen changes its oxidation state reversibly between two redox species (EV2+ to EV+•) as a result of bias-induced dynamic redox process. A gradual variation in Raman and absorption spectra, which shows maximum absorption corresponding to the yellow light, accompanies similar variation in color change of the device as visible by naked eye. These spectroscopic results are correlated with the perceived blue color, in the reflected light, by the eye to understand the actual reason behind this. Maximum absorption of yellow light by the device resulting in blue appearance has been explained using the concept of additive and subtractive primary colors.
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Держатели документа:
Indian Inst Technol Indore, Discipline Phys & MEMS, Mat Res Lab, Simrol 453552, India.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Univ Alberta, Natl Inst Nanotechnol, Edmonton, AB, Canada.
Доп.точки доступа:
Mishra, S.; Yogi, P.; Chaudhary, A.; Pathak, D. K.; Saxena, S. K.; Krylov, A. S.; Крылов, Александр Сергеевич; Sagdeo, P. R.; Kumar, R.; Department of Science and Technology (DST), Govt. of India; MHRD; CSIR (Govt. of India); DST under FIST scheme [SR/FST/PSI-225/2016]
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