Selective Electron‐ or Hole‐Transport Enhancement in Bulk‐Heterojunction Organic Solar Cells with N‐ or B‐Doped Carbon Nanotubes

Lee, Jun Young; Park, Ji Sun; Lee, Sun Hwa; Kim, Hoyeon; Yoo, Seunghyup; Kim, Sang Ouk

doi:10.1002/adma.201003296

Cited by 250 publications

(132 citation statements)

References 41 publications

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“…The direct solution mixing method to synthesize the nanocomposite was adapted from a method reported by Lee et al [28]. In brief, P3HT was dissolved in dry chloroform to make 20 mg·mL −1 solution, and 1 wt% of N-CNT (of the weight of P3HT) were added to the solution of P3HT in chloroform.…”

Section: Methodsmentioning

confidence: 99%

Bulk Heterojunction Solar Cell with Nitrogen-Doped Carbon Nanotubes in the Active Layer: Effect of Nanocomposite Synthesis Technique on Photovoltaic Properties

et al. 2015

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Nanocomposites of poly(3-hexylthiophene) (P3HT) and nitrogen-doped carbon nanotubes (N-CNTs) have been synthesized by two methods; specifically, direct solution mixing and in situ polymerization. The nanocomposites were characterized by means of transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray dispersive spectroscopy, UV-Vis spectrophotometry, photoluminescence spectrophotometry (PL), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, thermogravimetric analysis, and dispersive surface energy analysis. The nanocomposites were used in the active layer of a bulk heterojunction organic solar cell with the composition ITO/PEDOT:PSS/P3HT:N-CNTS:PCBM/LiF/Al. TEM and SEM analysis showed that the polymer successfully wrapped the N-CNTs. FTIR results indicated good π-π interaction within the nanocomposite synthesized by in situ polymerization as opposed to samples made by direct solution mixing. Dispersive surface energies of the N-CNTs and nanocomposites supported the fact that polymer covered the N-CNTs well. J-V analysis show that good devices were formed from the two nanocomposites, however, the in situ polymerization nanocomposite showed better photovoltaic characteristics.

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Section: Methodsmentioning

confidence: 99%

Bulk Heterojunction Solar Cell with Nitrogen-Doped Carbon Nanotubes in the Active Layer: Effect of Nanocomposite Synthesis Technique on Photovoltaic Properties

et al. 2015

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“…and a hole-only device, the n-doping and p-doping of MWCNTs were found to have enhanced only the electron transport and the hole transport, respectively [77]. This indicates that the end-use tailor-fit tuning of CNTs is possible in electronic applications.…”

Section: Graphenementioning

confidence: 96%

“…The work function can be tuned by means of oxidation [76] or by doping with either nitrogen or boron [77]. This tunable work function contributes to the charge selectivity of CNTs.…”

Section: Electronic Properties Of Cntsmentioning

confidence: 99%

Carbon nanomaterials in organic photovoltaic cells

Kim¹,

Yang²,

Park³

2011

Carbon letters

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Carbon nanomaterials in organic photovoltaic (OPV) cells have attracted a great deal of interest for the development of high-efficiency, flexible, and low-cost solar cells. Due to the complicated structure of OPV devices, the electrical properties and dispersion behavior of the carbon nanomaterials should be controlled carefully in order for them to be used as materials in OPV devices. In this paper, a fundamental theory of the electrical properties and dispersion behavior of carbon nanomaterials is reviewed. Based on this review, a stateof-the-art OPV device composed of carbon nanomaterials, along with issues related to such devices, are discussed.

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“…Their results exhibited that the 0.01 wt% MWNTs doped P3HT:PCBM photovoltaic device had an PCE improvement of 29% as a result of induced alignment of P3HT chains which led to the more absorption of the solar spectrum as well as a better hole transport. Kim and coworkers [116] have explored the effect of incorporating nitrogen-(N) or boron-(B) doped MWNT on the performance of P3HT:PCBM solar cells. Unlike un-doped metallic multi wall CNTs which cause undesired electron-hole recombination, N or B doped CNTs which are uniformly dispersed in the active layer can enhance electron and hole transport, respectively, and eventually help carrier collection.…”

Section: Hybrid Solar Cells Based On Carbon Nanotubesmentioning

confidence: 99%

Recent Developments in Quantum Dots/CNT Co-Sensitized Organic Solar Cells

Soltani¹,

Katbab²,

Ameri³

2017

J Material Sci Eng

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Polymer solar cells (PSCs) are emerging alternative candidates to the standard silicone technology for green and renewable energy generation owing to their flexibility and solution processability. Bulk heterojunction (BHJ) organic solar cells (OSCs) based on conjugated semiconducting polymers as donor (D) and fullerene derivatives as acceptor (A) offer large D/A interfacial area, which overcomes the short exciton diffusion length. Although, recent advances in narrow band gap semiconducting polymers have led to the improvement in power conversion efficiency of organic photovoltaics (OPVs) beyond 10%, inefficient charge separation and low carrier mobility as well as negligible photon harvesting in near-infrared (NIR) and/or infrared (IR) region of the solar spectrum have still remained as bottle neck for ultimate performance of OPVs. Most PSCs only absorb the UV-visible part of the solar spectrum, leading to the low light harvesting efficiency. Hence, solution processed photoactive materials comprising nanostructured semiconducting inorganic quantum dots (QDs) as sensitizer have attracted great attention to improve energy conversion efficiency of the OPVs. This is attributed to the outstanding optoelectronic properties of QDs such as band gap tunability, potential NIR photons harvesting and multi exciton generation (MEG). However, the main shortcoming of inorganic QDs based OSCs is randomly hopping charge transport among discrete QD particles, which can be tackled through hybridization with one dimensional (1D) electrically conductive nanostructured materials such as carbon nanotube (CNT). By this way, CNT particles would behave as support for anchoring the light harvesting semiconductor QDs, leading to the enhancement of the exciton dissociation and charge transport towards the corresponding electrodes. Recently, manufacturing PSCs co-sensitized by QD loaded CNT has been shown as a promising direction to maximize performance of the device. This article reviews the recent developments in enhancement of OPVs" performance by utilization of high efficient light harvesting QDs and/or their hybrid with 1D CNTs.

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Selective Electron‐ or Hole‐Transport Enhancement in Bulk‐Heterojunction Organic Solar Cells with N‐ or B‐Doped Carbon Nanotubes

Cited by 250 publications

References 41 publications

Bulk Heterojunction Solar Cell with Nitrogen-Doped Carbon Nanotubes in the Active Layer: Effect of Nanocomposite Synthesis Technique on Photovoltaic Properties

Bulk Heterojunction Solar Cell with Nitrogen-Doped Carbon Nanotubes in the Active Layer: Effect of Nanocomposite Synthesis Technique on Photovoltaic Properties

Carbon nanomaterials in organic photovoltaic cells

Recent Developments in Quantum Dots/CNT Co-Sensitized Organic Solar Cells

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