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1. A novel backtracking approach for two-axis solar PV tracking plants

Author:
Fernández-Ahumada, L.M.; Ramírez-Faz, J.; López-Luque, R.; Varo-Martínez, M.; Moreno-García, I.M.; Casares de la Torre, F.
Source:
Renewable energy 2020 v.145 pp. 1214-1221
ISSN:
0960-1481
Subject:
light intensity,   etc   ; altitude; collectors; energy; shade;     Show all 5 Subjects
Abstract:
... Solar tracking is a technique required to increase energy production in multiple photovoltaic (PV) facilities. In these plants, during low-elevation solar angle hours, shadows appear between the collectors causing a dramatic decrease in production. This paper presents a novel optimal tracking strategy to prevent the creation of these shadows. The presented method determines whether or not there is ...
DOI:
10.1016/j.renene.2019.06.062

2. Highly Sensitive Depolarized Light Scattering To Monitor Aggregation of Spherical Gold Nanoparticles

Author:
Kang, Dooho; Lee, Seong Youl; Kim, Joon Heon
Source:
Journal of physical chemistry 2019 v.123 no.23 pp. 14625-14631
ISSN:
1932-7455
Subject:
light scattering; polarized light,   etc   ; nanogold; physical chemistry;     Show all 4 Subjects
Abstract:
... Aggregation of spherical gold nanoparticles (AuNPs) was monitored by simultaneous measurement of extinction, polarized light scattering (PLS), and depolarized light scattering (dPLS) spectra over time. The dPLS showed higher sensitivity to AuNP aggregation than the others due to its intrinsic sensitivity to the change in both the aspect ratio and volume of aggregates. This demonstrates that dPLS c ...
DOI:
10.1021/acs.jpcc.9b01708

3. High efficiency hybrid white organic light-emitting diodes based on a simple and efficient exciton regulation emissive layer structure

Author:
Chen, Yuwen; Ying, Shian; Sun, Qian; Dai, Yanfeng; Qiao, Xianfeng; Yang, Dezhi; Chen, Jiangshan; Ma, Dongge
Source:
RSC advances 2018 v.8 no.71 pp. 40883-40893
ISSN:
2046-2069
Subject:
light emitting diodes; light intensity; white light
Abstract:
... It is well-known that hybrid white organic light-emitting diodes (WOLEDs) are constructed by blue fluorophors and red-green or orange phosphors, therefore, theoretically exhibiting the advantages of long lifetime and high efficiency. However, the efficiency is far from reaching the expected values. Here, we designed a simple and efficient exciton regulation emissive layer (EML) structure to fabric ...
DOI:
10.1039/c8ra08753a

4. Properties and Application of Single Eu²⁺-Activated Color Tuning Phosphors

Author:
Zhang, Xiangting; An, Zhengce; Dong, Rujia; Song, Yanhua; Zheng, Keyan; Sheng, Ye; Shi, Zhan; Zou, Haifeng
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.12 pp. 10724-10733
ISSN:
2168-0485
Subject:
light emitting diodes; light intensity,   etc   ; color; crystal structure; lighting; luminescence;     Show all 6 Subjects
Abstract:
... The color point tuning is significant for expanding the application of optical materials (phosphors). In this work, one type of single Eu²⁺-activated high bright phosphor was prepared, and the color point could be tuned only by controlling the doping level of the activator ion. The phase and crystal structure of the matrix material Y₂Mg₂Al₂Si₂O₁₂ (YMAS) were identified and analyzed. The luminescen ...
DOI:
10.1021/acssuschemeng.9b01401

5. Optical Properties of In₂ₓGa₂–₂ₓO₃ Nanowires Revealed by Photoacoustic Spectroscopy

Author:
Zelewski, Szymon J.; Zhou, Ziyao; Li, Fangzhou; Kang, Xiaolin; Meng, You; Ho, Johnny C.; Kudrawiec, Robert
Source:
ACS applied materials & interfaces 2019 v.11 no.21 pp. 19260-19266
ISSN:
1944-8252
Subject:
light intensity; light scattering,   etc   ; absorption; nanowires; oxides; photoacoustic spectroscopy; transistors;     Show all 7 Subjects
Abstract:
... Group III oxides, such as In₂O₃ and Ga₂O₃, have proved to be good candidates as active materials for novel electronic devices, including high-mobility transistors, gas sensors, and UV photodetectors. The ability to tune optical and electronic properties is provided by alloying In₂ₓGa₂–₂ₓO₃ (InGaO) in a broad compositional range. Further development of InGaO compounds in the form of nanowires (NWs) ...
DOI:
10.1021/acsami.9b00756

6. Poly(dithiazolfluorene-alt-selenadiazolobenzotriazole)-Based Blue-Light Photodetector and Its Application in Visible-Light Communication

Author:
Guo, Hang; Wang, Yang; Wang, Rui; Liu, Shengze; Huang, Kai; Michinobu, Tsuyoshi; Dong, Guifang
Source:
ACS applied materials & interfaces 2019 v.11 no.18 pp. 16758-16764
ISSN:
1944-8252
Subject:
blue light; white light,   etc   ; activation energy; communications technology; polymers; triazoles;     Show all 6 Subjects
Abstract:
... Conjugated polymers have attracted broad interest from synthetic chemists and device developers in optoelectronic fields. In this study, we report a blue-light organic photodetector (OPD) based on our low-band and ambipolar PSeN polymer. Besides high stability, the device has excellent color-selective property in the visible-light region. At the bias of −3 V, the ratio of the external quantum effi ...
DOI:
10.1021/acsami.9b00467

7. Light and auxin signaling cross-talk programme root development in plants

Author:
Kumari, Sony; Panigrahi, Kishore C S
Source:
Journal of biosciences 2019 v.44 no.1 pp. 26
ISSN:
0250-5991
Subject:
blue light; white light,   etc   ; auxins; plant hormones; signal transduction; wavelengths;     Show all 6 Subjects
Abstract:
... Root development in plants is affected by light and phytohormones. Different ranges of light wavelength influence root patterning in a particular manner. Red and white light promote overall root development, whereas blue light has both positive as well as negative role in these processes. Light-mediated root development primarily occurs through modulation of synthesis, signaling and transport of t ...
DOI:
10.1007/s12038-018-9838-2

8. Constructing a Green Light Photodetector on Inorganic/Organic Semiconductor Homogeneous Hybrid Nanowire Arrays with Remarkably Enhanced Photoelectric Response

Author:
Lin, Haowei; Chen, Kai; Li, Mingke; Ji, Beibei; Jia, Yaohui; Liu, Xinyu; Li, Jinling; Song, Weiqiang; Guan, Chunlong
Source:
ACS applied materials & interfaces 2019 v.11 no.10 pp. 10146-10152
ISSN:
1944-8252
Subject:
green light; light intensity,   etc   ; electrochemistry; electrons; energy; nanowires; semiconductors;     Show all 7 Subjects
Abstract:
... We demonstrate that a novel photodetector is constructed by CdS/poly(p-phenylene vinylene) (PPV) homogeneous hybrid nanowire arrays via a simple template-assisted electrochemical codeposition approach. Owing to the well-matched energy levels between CdS and PPV, the recombination of photogenerated electrons and holes in CdS/PPV hybrid nanowire arrays is greatly inhibited. It is found that the homo ...
DOI:
10.1021/acsami.8b20340

9. Mn⁴⁺-activated Li₃Mg₂SbO₆ as an ultrabright fluoride-free red-emitting phosphor for warm white light-emitting diodes

Author:
Wang, Shaoying; Sun, Qi; Devakumar, Balaji; Liang, Jia; Sun, Liangling; Huang, Xiaoyong
Source:
RSC advances 2019 v.9 no.6 pp. 3429-3435
ISSN:
2046-2069
Subject:
light emitting diodes; white light,   etc   ; color; manganese; temperature; wavelengths;     Show all 6 Subjects
Abstract:
... In this paper, we report on highly efficient Mn⁴⁺-activated double perovskite Li₃Mg₂SbO₆ (LMS) red-emitting phosphors. These LMS:Mn⁴⁺ phosphors can be efficiently excited over a broad wavelength band from 235 nm to 600 nm peaking at 344 nm and 469 nm, and exhibited an intense red emission band with a range from 600 nm to 800 nm centered around 651 nm. The optimal Mn⁴⁺ doping concentration of LMS:M ...
DOI:
10.1039/c8ra10158b

10. Blue and red light effects on stomatal oscillations

Author:
Ballard, Trevor; Peak, David; Mott, Keith
Source:
Functional plant biology 2019 v.46 no.2 pp. 146-151
ISSN:
1445-4408
Subject:
blue light; red light,   etc   ; fiber optics; guard cells; leaves; stomata;     Show all 6 Subjects
Abstract:
... The response of stomata to red and blue light was investigated using small fibre optics (66µm diameter) to control light levels on a single pair of guard cells without affecting the surrounding tissue. Low intensity red light (50µmolm-2s-1) applied to the entire leaf caused stomata to oscillate continuously for several hours with no apparent decrease in amplitude with time. Adding low intensity bl ...
DOI:
10.1071/FP18104

11. Superpixel-based automatic image recognition for landslide deformation areas

Author:
Yang, Yang; Song, Shuliang; Yue, Fucai; He, Wen; Shao, Wei; Zhao, Kui; Nie, Wen
Source:
Engineering geology 2019 v.259 pp. 105166
ISSN:
0013-7952
Subject:
light intensity,   etc   ; deformation; landslides; monitoring;     Show all 4 Subjects
Abstract:
... Obtaining continuous landslide deformation information is important for analyses of landslide processes. This paper proposes a landslide deformation area image recognition method. Using this method, the landslide area can be automatically identified, and continuous landslide deformation data can be obtained. This novel method is implemented using Python and the OpenCV open source libraries, and it ...
DOI:
10.1016/j.enggeo.2019.105166

12. Light Scattering Study of Internal Dynamics of Hyperbranched Polymers with Controlled Branching Patterns and Low Polydispersities in Dilute Solutions

Author:
Hao, Nairong; Zhu, Mo; Li, Lianwei
Source:
Macromolecules 2019 v.52 no.10 pp. 3794-3804
ISSN:
1520-5835
Subject:
light scattering,   etc   ; fractal dimensions; polystyrenes;     Show all 3 Subjects
Abstract:
... Internal dynamics of flexible polymer chains is one of the most important fundamental problems in polymer physics. Although numerous efforts have been devoted to the understanding of internal dynamics for linear polymers, little attention was paid to branched systems. This work aims to elucidate how the branching effect quantitatively influences the internal motions of long-subchain hyperbranched ...
DOI:
10.1021/acs.macromol.9b00248

13. Exciplex Organic Light-Emitting Diodes with Nearly 20% External Quantum Efficiency: Effect of Intermolecular Steric Hindrance between the Donor and Acceptor Pair

Author:
Wu, Tien-Lin; Liao, Ssu-Yu; Huang, Pei-Yun; Hong, Zih-Siang; Huang, Man-Ping; Lin, Chih-Chun; Cheng, Mu-Jeng; Cheng, Chien-Hong
Source:
ACS applied materials & interfaces 2019 v.11 no.21 pp. 19294-19300
ISSN:
1944-8252
Subject:
light emitting diodes,   etc   ; color; photoluminescence;     Show all 3 Subjects
Abstract:
... Exciplex emitters have emerged as an important class of thermally activated delayed fluorescence (TADF) materials for highly efficient OLEDs. A TADF exciplex emitter requires an intermolecular donor/acceptor pair. We have synthesized a bipolar donor-type material, DPSTPA, which was used to pair with known acceptor materials (2CzPN, 4CzIPN, or CzDBA). The OLEDs based on the exciplex emitters, DPSTP ...
DOI:
10.1021/acsami.9b04365

14. Correction to: Why is chlorophyll b only used in light-harvesting systems?

Author:
Kume, Atsushi; Akitsu, Tomoko; Nasahara, Kenlo Nishida
Source:
Journal of plant research 2019 v.132 no.3 pp. 457
ISSN:
0918-9440
Subject:
light harvesting complex,   etc   ; chlorophyll; photosynthesis;     Show all 3 Subjects
Abstract:
... The article Why is chlorophyll b only used in light-harvesting systems. ...
DOI:
10.1007/s10265-019-01104-y

15. Isomeric Quinoxalinedicarbonitrile as Color-Managing Acceptors of Thermally Activated Delayed Fluorescent Emitters

Author:
Kothavale, Shantaram; Lee, Kyung Hyung; Lee, Jun Yeob
Source:
ACS applied materials & interfaces 2019 v.11 no.19 pp. 17583-17591
ISSN:
1944-8252
Subject:
light emitting diodes,   etc   ; fluorescence; moieties;     Show all 3 Subjects
Abstract:
... Highly efficient yellow and red thermally activated delayed fluorescent (TADF) organic light-emitting diodes were developed using two quinoxalinedicarbonitrile units, quinoxaline-6,7-dicarbonitrile (6,7-DCQx) and quinoxaline-5,8-dicarbonitrile (5,8-DCQx) as electron acceptors, and t-butylcarbazole or 9,9-dimethylacridan as electron donors. The strong electron-withdrawing capability of the 5,8-DCQx ...
DOI:
10.1021/acsami.9b02824

16. Effect of Chemical Microenvironment in Spirothiopyran Monolayer Direct-Write Photoresists

Author:
Vijayamohanan, Harikrishnan; Bhide, Parth; Boyd, Dante; Zhou, Zhe; Palermo, Edmund F.; Ullal, Chaitanya K.
Source:
Langmuir 2019 v.35 no.11 pp. 3871-3879
ISSN:
1520-5827
Subject:
green light,   etc   ; guanidinium; hydrophilicity; isomers;     Show all 4 Subjects
Abstract:
... We study the effect of the microenvironment on writing chemical patterns into spirothiopyran monolayers over large areas in a single step with light. Surfaces functionalized with photoresponsive spirothiopyran are fabricated by chemically modifying amine-terminated monolayers. The merocyanine isomer selectively participates in a thiol-Michael addition reaction with maleimide-functionalized molecul ...
DOI:
10.1021/acs.langmuir.8b03304

17. Correction to: Effectiveness of Parachlorella kessleri cell disruption evaluated with the use of laser light scattering methods

Author:
Piasecka, Agata; Cieśla, Jolanta; Koczańska, Magdalena; Krzemińska, Izabela
Source:
Journal of applied phycology 2019 v.31 no.1 pp. 109
ISSN:
0921-8971
Subject:
light scattering,   etc   ; Parachlorella kessleri; equations;     Show all 3 Subjects
Abstract:
... The original version of this article unfortunately contained a mistake. Equation 8 was wrongly written. ...
DOI:
10.1007/s10811-018-1658-0

18. Two-Dimensional Hybrid Perovskite-Type Ferroelectric for Highly Polarization-Sensitive Shortwave Photodetection

Author:
Li, Lina; Liu, Xitao; Li, Yaobin; Xu, Zhiyun; Wu, Zhenyue; Han, Shiguo; Tao, Kewen; Hong, Maochun; Luo, Junhua; Sun, Zhihua
Source:
Journal of the American Chemical Society 2019 v.141 no.6 pp. 2623-2629
ISSN:
1520-5126
Subject:
polarized light,   etc   ; absorption; anisotropy; dissociation;     Show all 4 Subjects
Abstract:
... Two-dimensional (2D) materials have been well developed for polarization-sensitive photodetection, while new 2D members used in shortwave region (>2.5 eV) still remain scarce. The family of 2D hybrid perovskite ferroelectrics, in which the coupling of spontaneous polarization (Pₛ) and light benefits dissociation of photoinduced carriers, has shown great potential in this portfolio. Here, we report ...
DOI:
10.1021/jacs.8b12948

19. Stretchable and Ambient Stable Perovskite/Polymer Luminous Hybrid Nanofibers of Multicolor Fiber Mats and Their White LED Applications

Author:
Ercan, Ender; Tsai, Ping-Chun; Chen, Jung-Yao; Lam, Jeun-Yen; Hsu, Li-Che; Chueh, Chu-Chen; Chen, Wen-Chang
Source:
ACS applied materials & interfaces 2019 v.11 no.26 pp. 23605-23615
ISSN:
1944-8252
Subject:
light emitting diodes; light intensity; white light,   etc   ; fluorenes; hydrophobicity; mechanical properties; nanofibers; nanoparticles; photoluminescence; polyurethanes; thermoplastics;     Show all 11 Subjects
Abstract:
... We report the fabrication and optical/mechanical properties of perovskite/thermoplastic polyurethane (TPU)-based multicolor luminescent core–shell nanofibers and their large-scale fiber mats. One-step coaxial perovskite/TPU nanofibers had a high photoluminescence quantum yield value exceeding 23.3%, surpassing that of its uniaxial counterpart, due to the homogeneous distribution of perovskite nano ...
DOI:
10.1021/acsami.9b05527

20. Optical Haze Nanopaper Enhanced Ultraviolet Harvesting for Direct Soft-Fluorescent Emission Based on Lanthanide Complex Assembly and Oxidized Cellulose Nanofibrils

Author:
Zhang, Sufeng; Liu, Gang; Chang, Hui; Li, Xinping; Zhang, Zhao
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.11 pp. 9966-9975
ISSN:
2168-0485
Subject:
light; light emitting diodes; light scattering,   etc   ; cellulose nanofibers; diffusers; filtration; harvesting; oxidation; solar cells; transmittance;     Show all 10 Subjects
Abstract:
... Optical haze nanopapers were fabricated based on a self-assembly process of lanthanide complexes with tris(2-benzimidazolylmethyl) amine (NTB) [(Tb(NTB)Cl₃ and/or Eu(NTB)Cl₃] and TEMPO-oxidized cellulose nanofibrils (tCNFs), using a subsequent simple blending-vacuum filtration method. These optical haze nanopapers were characterized in terms of visible light transmittance, efficiency of ultraviole ...
DOI:
10.1021/acssuschemeng.9b00970