A designed bithiopheneimide-based conjugated polymer for organic photovoltaic with ultrafast charge transfer at donor/PC71BM interface: theoretical study and characterization

Li, Shuangbao; Duan, Yuai; Geng, Yun; Li, Haibin; Zhang, Jian-Zhao; Xu, Hong‐Liang; Zhang, Min; Su, Zhong‐Min

doi:10.1039/c4cp03022b

Cited by 53 publications

(44 citation statements)

References 86 publications

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“…where I A and I P are the PL intensity in the absence and presence of the quenching interface, respectively. By experimentally measuring I P /I A as a function of d, the value of L can be estimated by fitting eqn (2) to a plot of I P /I A vs d. As quenchers, PC 71 BM with its lowest unoccupied molecular orbital (E L ) of -4.3 eV 44 and spiro-OMeTAD with its highest occupied molecular orbital (E H ) of -5.22 eV 5 were chosen based on the valence band edge (E V ) and conduction band edge (E C ) of the perovskite being -5.43 and -3.93 eV, respectively. 5 Because the E L of PC 71 BM lies below the E C of the perovskite, the electrons and excitons that reach the perovskite/PC 71 BM interface are quenched by electron transfer from the perovskite to PC 71 BM.…”

Section: Electron and Hole Diffusion Lengthsmentioning

confidence: 99%

Morphological control of organic–inorganic perovskite layers by hot isostatic pressing for efficient planar solar cells

et al. 2015

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†Electronic Supplementary Information (ESI) available. UV-VIS-NIR absorption and PL spectra, PL quenching results when using CuPC, results of optimization of spin coating conditions, and J-V curves of solar cells with and without chlorobenzene washing. See Morphological control of organic-inorganic perovskite layers is crucial for efficient planar solar cells. In this study, we show that hot isostatic pressing (HIP) of perovskite layers using a pressure of 200 MPa in 90 °C water is very effective for improving perovskite film morphology. After HIP treatment, undesirable pin holes and spatial gaps between crystals in the perovskite layers were significantly reduced. Improved crystallinity and enhanced diffusion lengths for both electrons and holes were also confirmed in the HIP-treated perovskite layers. Solar cells containing the perovskite layers as light absorbers were fabricated and characterized under simulated solar light (AM1.5G, 100 mW/cm 2 ). The HIP treatment induced a marked enhancement of short-circuit current density, open-circuit voltage, fill factor, and power conversion efficiency because of the improved morphology and crystallinity and the enhanced carrier diffusion. The HIP-treated solar cells achieved efficiencies of 10.6 ± 0.7%, which are about 1.5 times higher than those of the untreated solar cells (7.20 ± 0.59%).

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Section: Electron and Hole Diffusion Lengthsmentioning

confidence: 99%

Morphological control of organic–inorganic perovskite layers by hot isostatic pressing for efficient planar solar cells

et al. 2015

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“…Normally, the energy of the donor's HOMO and acceptor's LUMO are used for quantitatively reckoning them [26]. So, the ΔG CR can be evaluated under the thermodynamic criteria as: [30,[34][35][36] ( ) ( )…”

Section: Gibbs Free Energymentioning

confidence: 99%

External Electric Field-Dependent Photoinduced Electron Transfer of Oligonaphthofurans-PC<sub>70</sub>BM in BJH Solar Cell

Song¹

2017

JAMS

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Abstract. To rely mainly on the impact of external electric field derived from the electronic coupling charge transfer rate in the change, the new theoretical method can not merely a better understanding of chemical structure the, external electric field and optoelectronic properties of donor(D)-acceptor(A) system , but also can be used for reasonable design of D-A system of novel organic solar cells. This article selects PC 70 BM (phenyl-fullerenes-butyric acid methyl ester) (good solubility, high electron mobility, with common polymer material to take shape a fine phase separation) as this acceptor; low five different kinds of chain length of oligonaphthofurans molecules (active material of fluorescent probe molecule) as the donor, using density functional theory on the basis of the Marcus theory to calculate the electronic coupling ,reorganization energy, gibbs free energy of reaction ,rates of the charge recombination and the rates of exciton dissociation for this study.

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“…In this regard, fullerene and their derivatives have been extensively used as acceptor materials within BHJ devices because of their important electronic properties such as small reorganization energy, high electron mobility and affinity [16][17][18]. Nowadays π-conjugated small molecules (SMs) have attracted considerable research interest for OPVs, due to their great advantages over their polymers and copolymers counterparts, including low cost manufacturing, flexibility, light weight, and well-defined molecular structure [19][20][21][22]. Recently, record-high OPV efficiencies have been obtained by innovations of SMs donor materials.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Approach Towards Rational Design and Characterization of Benzo[1,2-b:5-B’]dithiophene (BDT)-Based (A-D-A) Small Molecules of Relevance for High Performance Solar Cells

Khlaifia¹,

Mestiri²,

Mabrouk³

et al. 2018

J Material Sci Eng

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Benzo[1,2-b:5-B']dithiophene (BDT)-based small molecules with acceptor-donor-acceptor (A-D-A) structure were designed based on the experimental system BDTT-S-TR (1) for use as potential donor materials for organic photovoltaic (OPV) devices. Their geometry structures, electronic properties and other key parameters related to OPVs such as absorption spectra, energetic driving forces for the 2-4/PC 70 BM heterojunctions are ~10 4 times higher than that of the 1/PC 70 BM. From these predictions, we reached our purpose to provide rational design of three novel molecules that will be more promising candidates for high-efficiency SMs OPVs materials.

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A designed bithiopheneimide-based conjugated polymer for organic photovoltaic with ultrafast charge transfer at donor/PC71BM interface: theoretical study and characterization

Cited by 53 publications

References 86 publications

Morphological control of organic–inorganic perovskite layers by hot isostatic pressing for efficient planar solar cells

Morphological control of organic–inorganic perovskite layers by hot isostatic pressing for efficient planar solar cells

External Electric Field-Dependent Photoinduced Electron Transfer of Oligonaphthofurans-PC<sub>70</sub>BM in BJH Solar Cell

Theoretical Approach Towards Rational Design and Characterization of Benzo[1,2-b:5-B’]dithiophene (BDT)-Based (A-D-A) Small Molecules of Relevance for High Performance Solar Cells

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