Exciton Dissociation and Charge‐Transport Enhancement in Organic Solar Cells with Quantum‐Dot/N‐doped CNT Hybrid Nanomaterials

Lee, Jun Young; Kwon, Byoung‐Hwa; Park, Hyung Il; Kim, Hoyeon; Kim, Min; Park, Ji Sun; Kim, E Su; Yoo, Seunghyup; Jeon, Duk Young; Kim, Sang Ouk

doi:10.1002/adma.201204454

Cited by 103 publications

(66 citation statements)

References 50 publications

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“…Colloidal semiconductor nanocrystals or quantum dots have great potential for PV applications due to their high absorption coefficient, tunable band gap which is size dependent, multiple exciton generation with single photon absorption, tunable energy levels, slow exciton relaxation and low cost [13][14][15][16]. Despite such conceptual merits, QD based organic solar cells have demonstrated poor device performances as a result of randomly hopping charge transport among discrete QD particles.…”

Section: Introductionmentioning

confidence: 99%

“…Among various nanoparticles, colloidal semiconductor nanocrystals or quantum dots (QDs) have shown promising applicability in solution-processed transistors, solar cells, and other optoelectronic devices due to their high absorption coefficient, tunable band gap, multiple exciton generation with single photon absorption, tunable energy levels, slow exciton relaxation and low cost [13][14][15][16][17].…”

Section: Ternary Solar Cellsmentioning

confidence: 99%

“…For electron acceptors some polymers such as poly-[2-methoxy- [42], and ICBA [14], and graphene nano sheets [43][44][45] are vastly studied and used. Fullerenes are considered as the most appropriate electron acceptor due to the ultrafast photo induced charge transfer between electron donors and acceptors, high mobility and better phase segregation to create three dimensional (3D) networks for the transportation of electrons to the electrode [46].…”

Section: Common Materialsmentioning

confidence: 99%

“…Various sensitizers based on low band gap polymers [55][56][57][58][59][60][61][62][63], small molecules [64][65][66], dyes [67][68][69] and nanoparticles [13][14][15][16][17][18][19][20][21] are employed in the structure of the photoactive layer in combination with donor material which is usually consists of a large bandgap polymer and fullerene derivative as acceptor. Recently, the record PCEs over 12% have been reported for the PBDB-T:IT-M: BisPC 70 BM (1:1:0.2) ternary solar cells with a Jsc=17.3 mA/cm², Voc=0.95 V and FF=74% [42], which demonstrate the potential of ternary sensitization concept for OPVs' upscaling.…”

Section: Ternary Solar Cellsmentioning

confidence: 99%

“…In spite of aforementioned merits of OPVs, they still suffer from lack of acceptable efficiencies [12]. Improvement of OSCs efficiency by various means such as synthesis of new materials, micro morphological optimization and applying advanced strategies such as multi-junction structures, ternary near-IR sensitization and hybrid organic-inorganic systems have been the scope of many researches during last decades [13][14][15][16][17][18][19][20][21]. The latter strategy will be the focus of this review.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

Section: Ternary Solar Cellsmentioning

confidence: 99%

Section: Common Materialsmentioning

confidence: 99%

Section: Ternary Solar Cellsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Soltani¹,

Katbab²,

Ameri³

2017

J Material Sci Eng

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High‐Performance Polymer Solar Cells Containing Carbon Nanomaterials

Dai

2015

Carbon Nanomaterials for Advanced Energy Systems

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High‐Performance Hybrid Solar Cell Made from CdSe/CdTe Nanocrystals Supported on Reduced Graphene Oxide and PCDTBT

Tong

Mishra

et al. 2013

Adv Funct Materials

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Core/shell tetrapods synthesized from CdSe and CdTe exhibit a type II band offset that induces separation of charge upon photoexcitation and localizes carriers to different regions of the tetrahedral geometry. CdSe/CdTe nanocrystals immobilized on oleylamine‐functionalized reduced graphene oxide (rGO) sheets can be homogeneously mixed with an organic dye (PCDTBT) to form donor–acceptor dispersed heterojunctions and exhibit a high power conversion efficiency of ∼3.3% in solar cell devices. The near‐IR light absorbing type II nanocrystals complement the absorption spectrum of the visible light‐absorbing organics. The high efficiency is attributed to the amine‐functionalized rGO sheets, which allow intimate contact with the nanocrystals and efficient dispersal in the organic matrix, contributing to highly efficient charge separation and transfer at the nanocrystal, rGO, and polymer interfaces.

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Exciton Dissociation and Charge‐Transport Enhancement in Organic Solar Cells with Quantum‐Dot/N‐doped CNT Hybrid Nanomaterials

Cited by 103 publications

References 50 publications

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

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

High‐Performance Polymer Solar Cells Containing Carbon Nanomaterials

High‐Performance Hybrid Solar Cell Made from CdSe/CdTe Nanocrystals Supported on Reduced Graphene Oxide and PCDTBT

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