Designing ternary blend bulk heterojunction solar cells with reduced carrier recombination and a fill factor of 77%

Gasparini, Nicola; Jiao, Xuechen; Heumueller, Thomas; Baran, Derya; Matt, Gebhard J.; Fladischer, Stefanie; Spiecker, Erdmann; Ade, Harald; Brabec, Christoph J.; Ameri, Tayebeh

doi:10.1038/nenergy.2016.118

Cited by 345 publications

(301 citation statements)

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“…[18][19][20][21][22][23] In addition to the enhanced absorption profile, a favorable energy level alignment at the ternary BHJ interface can be formed by introducing an appropriate third material and hence improves the open-circuit voltage (V oc ). To circumvent this problem, ternary structure comprising three different materials with complementary absorptions has acted as an attractive means of broadening the active layer absorption and thereby increasing the photocurrent.…”

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Morphology Control Enables Efficient Ternary Organic Solar Cells

et al. 2018

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Ternary organic solar cells are promising alternatives to the binary counterpart due to their potential in achieving high performance. Although a growing number of ternary organic solar cells are recently reported, less effort is devoted to morphology control. Here, ternary organic solar cells are fabricated using a wide-bandgap polymer PBT1-C as the donor, a crystalline fused-ring electron acceptor ITIC-2Cl, and an amorphous fullerene derivative indene-C bisadduct (ICBA) as the acceptor. It is found that ICBA can disturb π-π interactions of the crystalline ITIC-2Cl molecules in ternary blends and then help to form more uniform morphology. As a result, incorporation of 20% ICBA in the PBT1-C:ITIC-2Cl blend enables efficient charge dissociation, negligible bimolecular recombination, and balanced charge carrier mobilities. An impressive power conversion efficiency (PCE) of 13.4%, with a high fill factor (FF) of 76.8%, is eventually achieved, which represents one of the highest PCEs reported so far for organic solar cells. The results manifest that the adoption of amorphous fullerene acceptor is an effective approach to optimizing the ternary blend morphology and thereby increases the solar cell performance.

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Morphology Control Enables Efficient Ternary Organic Solar Cells

et al. 2018

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“…In line with the requirement of panchromatic absorption for high current generation, low-bandgap materials, [4,6,7] ternary blends, [8][9][10] and tandem [11][12][13] device structures have been employed to address the optical limitations of current state-of-the art materials. Unfortunately, even though a few breakthroughs have been achieved, [8,17,18] many of the ternary devices are limited by low fill factor (FF) and/or low short-circuit current (J SC ) after adding more than ≈15-20% of the third component. Unfortunately, even though a few breakthroughs have been achieved, [8,17,18] many of the ternary devices are limited by low fill factor (FF) and/or low short-circuit current (J SC ) after adding more than ≈15-20% of the third component.…”

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Panchromatic Sequentially Cast Ternary Polymer Solar Cells

Ghasemi

Zhang

et al. 2016

Advanced Materials

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“…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

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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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Designing ternary blend bulk heterojunction solar cells with reduced carrier recombination and a fill factor of 77%

Cited by 345 publications

References 49 publications

Morphology Control Enables Efficient Ternary Organic Solar Cells

Morphology Control Enables Efficient Ternary Organic Solar Cells

Panchromatic Sequentially Cast Ternary Polymer Solar Cells

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

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