Enhanced solar energy conversion in Au-doped, single-wall carbon nanotube-Si heterojunction cells

Chen, Leifeng; He, Hong; Zhang, Shijun; Xu, Chunxiang; Zhao, Jun; Zhao, Shichao; Mi, Yuhong; Yang, Deren

doi:10.1186/1556-276x-8-225

Cited by 24 publications

(11 citation statements)

References 47 publications

(40 reference statements)

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“…In present experiment, the processes of EPD and doping are similar as that of our previous method in Ref. 12. In order to obtain the uniformity GP sheet solution, the chemical vapor deposition (CVD) GP (1 mg) was first dispersed in analytically pure isopropyl alcohol (IA) (200 ml) using the high power tip sonication for about 1.5 h. For better dispersing the GP, then the further ultrasonic treatment was carried out using a sonic bath for about 3 h. During the dispersing process, a little amount of Mg(NO 3 ) 2 6H 2 O was added into the solution to make the Mgþ absorbed on the surfaces of GP.…”

Section: Field Emission Performance Enhancement Of Au Nanoparticles Dmentioning

confidence: 68%

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Field emission performance enhancement of Au nanoparticles doped graphene emitters

Chen

Lei

et al. 2013

Applied Physics Letters

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Graphene (GP) field emitters fabricated by the electrophoretic deposition (EPD) and their field emission performance can be enhanced and tailed simultaneously by chemical doping Au nanoparticles (NPs). It was found that doped Au NPs could both decrease the resistance of GP emitters and increase the density of field emission sites. The Au-doped GP emitters showed lower turn-on voltage, lower threshold field, higher field enhancement factor, higher luminance intensity, and emitting uniformity, compared with that of pristine GP. This study will provide us to further understand the role of doping effect on the GP emitters used for the future display.

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Section: Field Emission Performance Enhancement Of Au Nanoparticles Dmentioning

confidence: 68%

“…12 The parameters of distance between two electrodes, constant DC voltage, and deposition time for the GP were 1 cm, 100 V, 15 min, respectively. After finishing EDP, the GP emitters were washed with the dilute nitric acid solution and the deionized water, respectively.…”

Section: Field Emission Performance Enhancement Of Au Nanoparticles Dmentioning

confidence: 99%

Field emission performance enhancement of Au nanoparticles doped graphene emitters

Chen

Lei

et al. 2013

Applied Physics Letters

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“…Three features in the measured Nyquist plots are highlighted as the following (Figure f). First, in the highest frequency region, the corresponding value in the x ‐axis stands for R S , which is lowered from 126 to 83 Ω after SnCl 2 coating. The higher carrier density in CNTs introduced by the p‐type doping effect is favorable for reducing R S .…”

Section: Resultsmentioning

confidence: 99%

“…According to previous studies, introducing functional materials into the CNT‐Si solar cells has proved to be an effective strategy to improve the cell efficiency. To this end, a variety of materials, such as acids, metallocenes, Au nanodots, AuCl 3 , colloidal TiO 2, polymethylmethacrylate, MoO x , and CuCl 2 /Cu(OH) 2 , have been explored, whose functions generally fall into three categories, including 1) chemical doping; 2) antireflection; and 3) acting as functional layers. For example, it was found that those introduced materials could dope CNTs and modulate the work function of CNTs as well as the diode/junction characteristics (e.g., for HNO 3 and Au salt) or act as an antireflection layer to enhance the light absorption and external quantum efficiency (e.g., for TiO 2 and polymethylmethacrylate) .…”

Section: Introductionmentioning

confidence: 99%

Improving Carbon Nanotube‐Silicon Solar Cells by Solution Processable Metal Chlorides

Zhao

Sun

et al. 2019

Solar RRL

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Carbon nanotube‐silicon (CNT‐Si) solar cells have the potential of being an alternative to the expensive crystal Si solar cells; however, there are critical limitations, such as the relatively low efficiency, instability, and lack of systematic improvement techniques. Herein, by investigating 17 solution processable, nonprecious metal chlorides, it is shown that appropriate chlorides can significantly improve the behavior of CNT‐Si solar cells individually or as mixtures. The results reveal a close relationship between the standard electrode potential of redox couples and the open‐circuit voltage (VOC) of solar cells, in which high VOC values are usually generated from chlorides with larger potentials. Detailed studies on SnCl2 and a mixture of FeCl3/ZrCl4 reveal mechanisms including doping of CNTs (increase in work function) and acting as antireflection layers, resulting in a substantial increase of both VOC and short‐circuit current density (JSC). As a result, stable power conversion efficiencies of 14.8% and 16.2% in CNT‐Si solar cells are achieved by simply spin‐coating SnCl2 or ZrCl4/FeCl3, respectively. The family of metal chlorides provide many opportunities for overcoming limitations and developing high‐performance CNT‐Si solar cells toward practical applications.

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“…[1][2][3][4][5][6] Since the 1980s, the significant role of dimensionality has been recognized apart from the bulk phase, inspiring the swift development of low-dimensional materials (0D, 1D, 2D). [7][8][9][10] The realm of 0D quantum dots, [11][12][13][14] 1D nanowire, [15][16][17][18][19] nanotube, [20][21][22][23][24] etc., has become hot research spots in succession. However, 2D materials remained to be a silent zone somehow.…”

Section: Introductionmentioning

confidence: 99%

Toward Wafer‐Scale Production of 2D Transition Metal Chalcogenides

Wang

Yang

2021

Adv Elect Materials

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When the timeline reached 2004, graphene, the single layer of graphite, was discovered through a scotch-tape exfoliation method and was found to have ultrahigh mobility. [25][26][27] Various 2D materials such as transition metal chalcogenides (TMCs), [28][29][30] boron nitrides (BNs), [31,32] black phosphorus, [33,34] and some new materials including Si, [35] Te, [36] and black arsenic-phosphorus [37] were subsequently synthesized, enabling the fabrication of numerous novel devices. The field of 2D materials is now making strong voice, which is no longer ignored by the scientific and technological community. [38][39][40] Among the various 2D materials, the TMCs constituted by the transition metal elements (M) and the chalcogen elements (X) are a large family. M can range from group 4B to group 10 in the periodic table, while X is S, Se, or Te. [41][42][43][44][45][46][47] Figure 1a exhibits the binary TMCs that have already been explored. This variation of composition of elements transfers to a wide range of properties ranging from insulators (e.g., HfS 2 ), [48,49] semiconductors (e.g., MoS 2 , WS 2 ), [50,51] semimetals (e.g., MoTe 2 , TiSe 2 ), [52,53] to metals (e.g., NbSe 2 , VS 2 ). [54][55][56] Furthermore, TMCs can form alloys in the formula such as WSe 2−x S x , with composition-tunable properties. [57][58][59] Unlike semimetallic graphene, semiconducting TMCs usually possess a bandgap. For example, MoS 2 exhibits a bandgap, transitioning from indirect bandgap to direct bandgap when it thins from bulk phase to monolayer (Figure 1b), boosting the photoluminescence (PL) efficiency. [51,[60][61][62] Additionally, inversion symmetry breaking and large spin-orbit interaction, resulting in two energetic degenerate but inequivalent valleys in the band structure of a TMC (Figure 1c), may lead to breakthroughs in valleytronics and spintronics. [63][64][65][66][67][68][69][70] A few TMCs (e.g., NbSe 2 , TaS 2 , VSe 2 ) have shown superconductivity, [71,72] charge density wave [73,74] and Mott transition (transition from metal to nonmetal). [75,76] In addition, some novel TMCs such as Fe 3 GeTe 2 display intrinsic magnetism with gate-tunable Curie points. [66,77] Semimetallic TMCs like WTe 2 show topological structures in the energy band, enabling the study on topological physics. [78,79] The rich intrinsic properties and superior tunability of TMCs hold great promise for all kinds of technologically important applications in electronics, optoelectronics, spintronics, valleytronics, etc. (Figure 1d). [51,[80][81][82][83][84][85][86][87][88][89][90][91] Due to numerous unique properties of 2D TMCs, devices such as transistors, photodetectors (PDs), and photodiodes based on 2D TMCs have been actively pursued. The ultimate destination of the miniaturization of the electronic devices will 2D transition metal chalcogenides (TMCs) have attracted tremendous interest from both the scientific and technological communities due to their variety of properties and superior tunability through layer number, composition, and inter...

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Enhanced solar energy conversion in Au-doped, single-wall carbon nanotube-Si heterojunction cells

Cited by 24 publications

References 47 publications

Field emission performance enhancement of Au nanoparticles doped graphene emitters

Field emission performance enhancement of Au nanoparticles doped graphene emitters

Improving Carbon Nanotube‐Silicon Solar Cells by Solution Processable Metal Chlorides

Toward Wafer‐Scale Production of 2D Transition Metal Chalcogenides

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