Charge Transfer from Carbon Nanotubes to Silicon in Flexible Carbon Nanotube/Silicon Solar Cells

Li, Xiaokai; Mariano, Marina; McMillon‐Brown, Lyndsey; Huang, Jing; Sfeir, Matthew Y.; Reed, Mark A.; Jung, Yeonwoong; Taylor, André D.

doi:10.1002/smll.201702387

Cited by 20 publications

(12 citation statements)

References 51 publications

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“…In this example, the silicon device thickness was varied from 54 to 200 mm and a high‐doped n + BSF was used. b) The flexible carbon nanotube–silicon heterojunction solar cells of Li et al Reproduced with permission . Copyright 2017, Wiley‐VCH.…”

Section: Improving Performancementioning

confidence: 99%

“…Sun et al and Li et al instead reduced the thickness of the entire silicon substrate, thus making flexible carbon nanotube–silicon heterojunction solar cells of 20 µm (Sun et al) and 50 µm (Li et al) thickness (Figure b). In both cases, the devices could be repeatedly bent without loss of performance, and provided good efficiencies of 6% (Sun et al) and 8.6% (Li et al), where the higher performance of the latter devices was attributed to better ideality of the junction and to the use of a TiO 2 AR coating and polyethylene teraphthalate encapsulation.…”

Section: Improving Performancementioning

confidence: 99%

“…Before our 2012 report on the early progress in this field, and the recent efficiency and active area records, the first report of carbon nanotube–silicon heterojunctions being used specifically for solar cells was by Wei et al in 2007 . The overall power conversion efficiency (PCE) of Wei et al's device was around 1.3% but, as can be seen in Figure 1 and in Table S1 of the Supporting Information, very rapid efficiency gains have been made since then, as might be expected for an architecture based on the already mature field of silicon photovoltaics (PV). However, there is still significant room for improvement in the maximum efficiency of proof‐of‐principle laboratory cells.…”

Section: Introductionmentioning

confidence: 97%

“…Rather than looking at the photocurrent spectra, Li et al used transient absorption spectroscopy to probe a contribution from the nanotubes . While the clarity of the data is somewhat confounded by the use of a 920 nm excitation for (7,6) nanotubes with first‐ and second‐order optical transitions of 1120 and 648 nm, respectively, and by the fact that the nanotube films were produced from superacid suspensions and the superacid is known to be able to remain adsorbed on the nanotubes, maintaining a considerable degree of doping and thus significantly reducing the oscillator strength of the fundamental transition that was being probed, a measurable signal was nevertheless observed from the nanotubes, separate from that of the silicon.…”

Section: Introductionmentioning

confidence: 99%

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Advances in Carbon Nanotube–Silicon Heterojunction Solar Cells

Tune

Flavel

2018

Advanced Energy Materials

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in this field as represented in Figure 2 and is broadly divided into two halves. The first half presents some essential background information on carbon nanotubes, particularly in relevance to their role in these kinds of solar cells, as well as a consideration of aspects such as thin film properties, device stability, scale-up, and operating mechanism, while the second half deals with the factors involved in improving performance.This review has been constrained almost exclusively to covering developments in the field of carbon nanotubes interfaced with monocrystalline silicon, though the field is also informed by other work being done in the associated areas of graphene-silicon and conducting polymer-silicon solar cells, as well as the use of nanotube films interfaced with polycrystalline silicon and other semiconductors, perovskites, organic photovoltaics, and more. This is partly in the interests of being able to provide a useful and informative level of technical detail while keeping the work to a manageable and digestible size both for those already working in the field and those new to it. It is also because although there are many parallels between, for example, the nanotube-silicon and polymer-silicon or graphene-silicon works, there are several important and fundamental differences, not the least of which may be the potential complexity/diversity of the operating mechanism(s) in the nanotube-silicon case. For information on these and other related types of photovoltaic device architectures incorporating carbon nanotubes, we refer the reader to Zielke et al., [49] Wang et al., [50] and Arnold et al., [51] as well as Li et al. [52] which also includes an overview of the carbon nanotube-silicon architecture as a part of the broader carbon-silicon theme. Table S1 of the Supporting Information provides a detailed and comprehensive list of published works in the carbon nanotube-silicon field along with various performance measurements, device structure parameters, and material properties. BackgroundAlthough once an exotic, poorly understood, and difficult to obtain material, carbon nanotubes are now relatively well known, well understood, and widely available from commercial suppliers. Briefly, single-walled carbon nanotubes (SWCNT) are very high aspect ratio cylinders of graphene in which the Heterojunctions of carbon nanotubes interfaced with silicon respond to light illumination and can be operated in the power regime as solar cells. Very significant advances have been made in the last 5 years both in terms of headline performance values and in fundamental understanding of the underlying operating principles, as well as the sophistication of the devices and studies being reported. The body of literature is growing rapidly, and the latest power conversion efficiency and active area records have now reached over 17% and 2 cm 2 , respectively. Thus, the authors believe that it is now a useful time for an evaluation of the current state-of-the-art and challenges going forward, as well as for a comprehensively ...

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Section: Improving Performancementioning

confidence: 99%

Section: Improving Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Advances in Carbon Nanotube–Silicon Heterojunction Solar Cells

Tune

Flavel

2018

Advanced Energy Materials

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“…In specific, single-walled carbon nanotube/Si (p-n) solar cells are developed via scalable room temperature processes. 158…”

Section: Low-dimensional Materialsmentioning

confidence: 99%

Flexible and stretchable inorganic solar cells: Progress, challenges, and opportunities

El‐Atab

Hussain

2020

MRS Energy & Sustainability

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A Self‐Powered CNT–Si Photodetector with Tuneable Photocurrent

Pelella

Capista

Passacantando

et al. 2022

Adv Elect Materials

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A photodetector with bias‐tuneable current is realized by adding a film of single‐walled carbon nanotubes (CNT), forming a CNT/Si3N4/Si capacitor, to a prefabricated Pt–Ti/Si3N4/Si metal–insulator–semiconductor (MIS) diode. Electrical characterization of the entire device is performed to extract the temperature‐dependent ideality factor and Schottky barrier height in the framework of the thermionic emission theory. The CNT/Si3N4/Si capacitor increases the reverse current of the parallel Pt–Ti/Si3N4/Si MIS diode by adding a Fowler–Nordheim tunneling current at high reverse voltage bias. This feature endows the photodetector with two different photocurrent levels, photoresponsivity up to 370 mA W−1 and external quantum efficiency up to 50% at 950 nm wavelength. The device also shows a different photoresponse when light is focused on the CNT/Si3N4/Si region or around the Pt–Ti/Si3N4/Si structure. The photodetector can also be used as an optoelectronic Boolean logic device, in which the applied voltage bias and the incident light are the two input signals, and the photocurrent is the output. Furthermore, light generates a photocurrent at zero voltage and a photovoltage at zero current, making the device a self‐powered photodetector.

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Charge Transfer from Carbon Nanotubes to Silicon in Flexible Carbon Nanotube/Silicon Solar Cells

Cited by 20 publications

References 51 publications

Advances in Carbon Nanotube–Silicon Heterojunction Solar Cells

Advances in Carbon Nanotube–Silicon Heterojunction Solar Cells

Flexible and stretchable inorganic solar cells: Progress, challenges, and opportunities

A Self‐Powered CNT–Si Photodetector with Tuneable Photocurrent

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