Improving the efficiency and stability of binary small-molecule organic solar cells by incorporating a small amount of polymer acceptor

Yin, Pan; Ma, Yunlong; Zheng, Qingdong

doi:10.1039/d2ta01902g

Cited by 7 publications

(3 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The a value indicates the degree of linearity and closer to unity means smaller bimolecular recombination. 30 The calculated a value of the fabricated OPDs was 0.93 at À1 V as shown in Figure 2f, and thus the decreased R values depending on the light intensity is expected to be from some degree of bimolecular recombination in the devices.…”

Section: Opd Propertiesmentioning

confidence: 89%

Synthesis and characterization of a copper(II) phthalocyanine‐based dye for organic photodetectors

Kim

Kang

Jung

2022

Bulletin Korean Chem Soc

View full text Add to dashboard Cite

Novel copper(II) 4,4 0 ,4 00 ,4 000 -tetra(hexylthienyl)phthalocyanine (CuPc-HT) was synthesized via Stille coupling reaction between 2-trimethylstannyl-5-hexylthiophene and tetra-brominated copper(II) phthalocyanine (CuPc). The incorporation of hexylthiophene to CuPc increased organic solubility, Q-band absorption and p-type characteristics. The bulk heterojunction organic photodetectors (OPDs) were developed by blending CuPc-HT with n-type [6,6]-phenyl-C 71 -butyric acid methyl ester (PC 71 BM). CuPc-HT:PC 71 BM-based devices showed the strong green light detection in the range of 400-600 nm. The measured specific detectivity (D*) was 3.1 Â 10 11 Jones under 530 nm lightemitting diode (LED) light of 0.1 mW/cm 2 at À2 V, which was approximately three times higher than those under 680 nm red LED irradiation. Dynamic characteristics of OPDs were investigated, and the À3 cut-off frequency of CuPc-HT:PC 71 BM devices was extremely high as 0.1 MHz. Notably, the signal response time at À1.0 V was ultrafast to be 9 μs. Even though CuPc-HT:PC 71 BM devices showed insufficient static properties, their dynamic characteristics were comparable with those of state-of-the-art OPDs.

show abstract

Section: Opd Propertiesmentioning

confidence: 89%

Synthesis and characterization of a copper(II) phthalocyanine‐based dye for organic photodetectors

Kim

Kang

Jung

2022

Bulletin Korean Chem Soc

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5][6][7][8][9][10][11][12][13] Among different kinds of OSCs, all-small-molecule (ASM) OSCs have attracted the attention of researchers by virtue of their well-defined chemical structures and remarkable reproducibility of small molecular materials. [14][15][16][17][18] As a main challenge, small molecule donors (SMDs) possess similar structures compared to non-fullerene acceptors (NFAs), which indicates their excellent miscibility, possessing challenges in controlling their blend film morphology. 19,20 Weak or strong miscibility may cause self-aggregation or over-mixing rather than forming interpenetrating network morphology, which will lead to reduced exciton dissociation and carrier transfer efficiency as well as increased probability of charge recombination, limiting the power conversion efficiency (PCE) improvement of ASM OSCs.…”

Section: Introductionmentioning

confidence: 99%

“…As one of the leading research topics in photovoltaic technology, organic solar cells (OSCs) are considered to have broad application prospects for semi‐transparency and wearable photovoltaics, demonstrating significant development in recent decades 1–13 . Among different kinds of OSCs, all‐small‐molecule (ASM) OSCs have attracted the attention of researchers by virtue of their well‐defined chemical structures and remarkable reproducibility of small molecular materials 14–18 . As a main challenge, small molecule donors (SMDs) possess similar structures compared to non‐fullerene acceptors (NFAs), which indicates their excellent miscibility, possessing challenges in controlling their blend film morphology 19,20 .…”

Section: Introductionmentioning

confidence: 99%

Side‐chain symmetry‐breaking strategy on porphyrin donors enables high‐efficiency binary all‐small‐molecule organic solar cells

Zou,

Zhang,

Shen

et al. 2024

SusMat

View full text Add to dashboard Cite

Side‐chain symmetry‐breaking strategy plays an important role in developing photovoltaic materials for high‐efficiency all‐small‐molecule organic solar cells (ASM OSCs). However, the power conversion efficiencies (PCEs) of ASM OSCs still lag behind their polymer‐based counterparts, which can be attributed to the difficulties in achieving favorable morphology. Herein, two asymmetric porphyrin‐based donors named DAPor‐DPP and DDPor‐DPP were synthesized, presenting stronger intermolecular interaction and closer molecular stacking compared to the symmetric ZnP‐TEH. The DAPor‐DPP:6TIC blend afforded a favorable morphology with nanoscale phase separation and more ordered molecular packing, thus achieving more efficient charge transportation and suppressed charge recombination. Consequently, the DAPor‐DPP:6TIC‐based device exhibited superior photovoltaic parameters, yielding a champion PCE of 16.62% higher than that of the DDPor‐DPP‐based device (14.96%). To our knowledge, 16.62% can be ranked as one of the highest PCE values among the binary ASM OSC filed. This work provides a prospective approach to address the challenge of ASM OSCs in improving film morphology and further achieving high efficiency via side‐chain symmetry‐breaking strategy, exhibiting great potential in constructing efficient ASM OSCs.

show abstract

Optimization of Charge Management and Energy Loss in All‐Small‐Molecule Organic Solar Cells

et al. 2023

View full text Add to dashboard Cite

All‐small‐molecule organic solar cells (ASM‐OSCs) have received tremendous attention in recent decades because of their advantages over their polymer counterparts. These advantages include well‐defined chemical structures, easy purification, and negligible batch‐to‐batch variation. Remarkable progress with a power conversion efficiency (PCE) of over 17% has recently been achieved with improved charge management (FF × JSC) and reduced energy loss (Eloss). Morphology control is the key factor in the progress of ASM‐OSCs, which remains a significant challenge because of the similarities in the molecular structures of the donors and acceptors. In this review, we summarize the effective strategies for charge management and/or Eloss reduction from the perspective of effective morphology control. We aim to provide practical insights and guidance for material design and device optimization to promote further development of ASM‐OSCs to a level where they can compete with or even surpass the efficiency of polymer solar cells.This article is protected by copyright. All rights reserved

show abstract

Improving the efficiency and stability of binary small-molecule organic solar cells by incorporating a small amount of polymer acceptor

Abstract: Small-molecule organic solar cells (SMOSCs) have the advantage of good reproducibility with the low batch-to-batch variation of small-molecule materials, but they may have poor stability due to the unstable morphology...

Cited by 7 publications

References 42 publications

Synthesis and characterization of a copper(II) phthalocyanine‐based dye for organic photodetectors

Synthesis and characterization of a copper(II) phthalocyanine‐based dye for organic photodetectors

Side‐chain symmetry‐breaking strategy on porphyrin donors enables high‐efficiency binary all‐small‐molecule organic solar cells

Optimization of Charge Management and Energy Loss in All‐Small‐Molecule Organic Solar Cells

Contact Info

Product

Resources

About