Optimized Active Layer Morphologies via Ternary Copolymerization of Polymer Donors for 17.6 % Efficiency Organic Solar Cells with Enhanced Fill Factor

Guo, Xia; Fan, Qunping; Wu, Jiada; Li, Guangwei; Peng, Zhongxiang; Su, Wenyan; Lin, Ji; Hou, Lintao; Qin, Yunpeng; Ade, Harald; Ye, Long; Zhang, Maojie; Li, Yongfang

doi:10.1002/ange.202010596

Cited by 27 publications

(17 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 8–14 ] State‐of‐the‐art devices can yield power conversion efficiencies (PCEs) of exceeding 18%, heralding a bright future for the commercialization of OSCs. [ 15–23 ]…”

Section: Introductionmentioning

confidence: 99%

A Well‐Mixed Phase Formed by Two Compatible Non‐Fullerene Acceptors Enables Ternary Organic Solar Cells with Efficiency over 18.6%

et al. 2021

View full text Add to dashboard Cite

The ternary strategy, introducing a third component into a binary blend, opens a simple and promising avenue to improve the power conversion efficiency (PCE) of organic solar cells (OSCs). The judicious selection of an appropriate third component, without sacrificing the photocurrent and voltage output of the OSC, is of significant importance in ternary devices. Herein, highly efficient OSCs fabricated using a ternary approach are demonstrated, wherein a novel non‐fullerene acceptor L8‐BO‐F is designed and incorporated into the PM6:BTP‐eC9 blend. The three components show complementary absorption spectra and cascade energy alignment. L8‐BO‐F and BTP‐eC9 are found to form a homogeneous mixed phase, which improves the molecular packing of both the donor and acceptor materials, and optimizes the ternary blend morphology. Moreover, the addition of L8‐BO‐F into the binary blend suppresses the non‐radiative recombination, thus leading to a reduced voltage loss. Consequently, concurrent increases in open‐circuit voltage, short‐circuit current, and fill factor are realized, resulting in an unprecedented PCE of 18.66% (certified value of 18.2%), which represents the highest efficiency values reported for both single‐junction and tandem OSCs so far.

show abstract

“…[ 8–14 ] State‐of‐the‐art devices can yield power conversion efficiencies (PCEs) of exceeding 18%, heralding a bright future for the commercialization of OSCs. [ 15–23 ]…”

Section: Introductionmentioning

confidence: 99%

A Well‐Mixed Phase Formed by Two Compatible Non‐Fullerene Acceptors Enables Ternary Organic Solar Cells with Efficiency over 18.6%

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Then to reveal the mechanism of interaction between PDINO and BCF, the electrospray ionization (ESI) mass spectrometry (MS), 19 F nuclear magnetic resonance ( 19 F-NMR), UV-vis absorption spectroscopy, Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS) measurements were conducted to analyze the PDINO-BCF mixture.…”

Section: Resultsmentioning

confidence: 99%

“…These results indicated that PDINO easily formed complexes with BCF-H 2 O/methanol complex, and the interaction between PDINO and BCF-H 2 O/methanol was relatively strong so that they generated stable air ions detectable by MS detectors. 19 F NMR spectra of BCF in PDINO: BCF mixed methanol-D4 solution showed new sets of F atoms, and each set included three chemical shifts of F on ortho-, meta-, para-sites on the benzene rings. B and F sites on the BCF are possible sites to interact with PDINO.…”

Section: Resultsmentioning

confidence: 99%

“…[1][2][3][4][5] Organic solar cells (OSCs) are promising cost-effective, light-weight alternatives to silicon-based solar cells for certain applications. [5][6][7][8][9][10][11][12][13][14][15][16] Plentiful active layer materials, such as PM6 17 , PM7 18 , PM6-Tz20 19 , PTQ10 20 , D18 21 , M34 22 , Y6 23 , BTP-4Cl 24 and their analogues, have been explored to boost the efficiency of OSCs to over 16%. 25 In contrast, it is more challenging to develop efficient interface materials with all requirements of high conductivity, proper work function/energy levels, and orthogonal solubility, etc., and very limited types of efficient organic semiconducting interfaces were employed for high-performance OSCs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fine-Tuning Contact via Complexation for High-Performance Organic Solar Cells

Zhang

Han

et al. 2022

CCS Chem

View full text Add to dashboard Cite

For organic optoelectronic devices, precise tuning of the electrical property of both active layers and interfaces is crucial to achieve enhanced device performance. Here we develop a facile method using complexation to modify the work function and energy levels of cathode contact layers in organic solar cells (OSCs) to achieve suitable work function/energy levels while retaining relatively good conductivity. Compared to the control devices with neat (N, N-dimethyl-ammonium N-oxide) propyl perylene diimide (PDINO) contacts, the tris(pentafluorophenyl) borane (BCF) complexed PDINO cathode contacts showed enhanced power conversion efficiencies (PCEs), which is independent of the composition of the active layer. More specifically, single-junction OSCs employing PDINO cathode contact with 2 wt.% BCF-additive achieved an average PCE of 17.7%. Based on experimental data and theoretical modeling, we find that the boron cores of BCF coordinate with amino N-oxide terminal substituent of PDINO after generating BCF-H 2 O/methanol complexes. BCF segments with strong electron withdrawing property can effectively reduce the energy levels of PDINO-BCF complex, and thus enhance device PCE when it is used as a cathode contact in OSCs. This strategy can be extended to other types of photovoltaic devices, photodetectors and light emitting diodes.

show abstract

“…an electron donor and an electron acceptor (bulk-heterojunction, BHJ) for light harvesting, the latter of which is often realized using fullerene derivatives ( Sariciftci et al, 1992 ; Liu et al, 2014 ; Zhao et al, 2016 ; Rasool et al, 2019 ). Although recent high performance organic solar cells with power conversion efficiencies of up to 17% employed non-fullerene acceptors ( Cui et al, 2020 ; Guo et al, 2020 ; Liu et al, 2020 ), fullerene derivatives are still regularly used, e.g., on industrial scale or as a third component in ternary semiconductor mixtures( Pan et al, 2019 ; Chen et al, 2021 ). The supramolecular order of organic solar cells is critical for charge carrier separation and transport ( Gurney et al, 2019 ; Zhao et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Molecular Chromophore-DNA Architectures With Fullerenes: Optical Properties and Solar Cells

et al. 2021

View full text Add to dashboard Cite

Supramolecular chemistry allows the construction of complex molecular architectures and the design of collective photophysical properties. DNA is an attractive template to build such supramolecular architectures due to its helical structure, the defined distances between the bases and the canonical base pairing that results in precise control of the chromophore position. The tailored properties of DNA-templated supramolecules eventually allow their implementation into optoelectronic applications. For the generation of free charge carriers from photo-generated excitons, fullerenes can be utilized. We synthesized two fullerene derivates, one of which binds by electrostatic interactions to single-stranded DNA, while the other contains two 2′-deoxyuridine moieties and assembles specifically along oligo-2′-deoxyadenosines (dA20) as DNA template. The DNA-directed assembly of both fullerenes in aqueous solution was investigated by UV/Vis absorbance and circular dichroism (CD) spectroscopy. The specific interactions with DNA make fullerenes with the 2′-deoxyuridine moieties a significantly better component for supramolecular DNA architectures. We studied the fluorescence quenching of both fullerenes with a DNA chromophore assembly. To investigate one of the key properties for optoelectronic applications, that is the supramolecular structure of the DNA-based assemblies in the solid phase, we characterized the CD of supramolecular chromophore-DNA architectures in thin films. Remarkably, the helical chirality of the chromophore assemblies that is induced by the DNA template is conserved even in the solid state. Upon implementation into organic solar cells, the external quantum efficiency measurements showed charge carrier generation on all three chromophore components of the DNA assemblies. The fullerenes with the 2′-deoxyuridine moieties enhance the quantum efficiency of the conversion process significantly, demonstrating the potential of DNA as structural element for ordering chromophores into functional π-systems, which may be employed in future organic solar cells.

show abstract

Optimized Active Layer Morphologies via Ternary Copolymerization of Polymer Donors for 17.6 % Efficiency Organic Solar Cells with Enhanced Fill Factor

Cited by 27 publications

References 63 publications

A Well‐Mixed Phase Formed by Two Compatible Non‐Fullerene Acceptors Enables Ternary Organic Solar Cells with Efficiency over 18.6%

A Well‐Mixed Phase Formed by Two Compatible Non‐Fullerene Acceptors Enables Ternary Organic Solar Cells with Efficiency over 18.6%

Fine-Tuning Contact via Complexation for High-Performance Organic Solar Cells

Molecular Chromophore-DNA Architectures With Fullerenes: Optical Properties and Solar Cells

Contact Info

Product

Resources

About