High‐Performance Non‐Fullerene Organic Solar Cells Based on a Selenium‐Containing Polymer Donor and a Twisted Perylene Bisimide Acceptor

Liu, Tao; Meng, Dong; Cai, Yunhao; Sun, Xiaobo; Li, Yan; Huo, Lijun; Liu, Feng; Wang, Zhaohui; Russell, Thomas P.; Sun, Yanming

doi:10.1002/advs.201600117

Cited by 78 publications

(51 citation statements)

References 37 publications

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“…The development of WBG copolymers is crucially important. It was realized that the performance of organic photovoltaic devices like tandem/ternary/nonfullerene organic solar cells are strongly dependent on the choice of WBG materials . Although steady improvements in PCEs have been achieved in recent years, their overall performance is still much lower than those of MBG polymer counterparts …”

Section: Methodsmentioning

confidence: 99%

Alkyl Side‐Chain Engineering in Wide‐Bandgap Copolymers Leading to Power Conversion Efficiencies over 10%

et al. 2016

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A series of wide-bandgap (WBG) copolymers with different alkyl side chains are synthesized. Among them, copolymer PBT1-EH with moderatly bulky side chains on the acceptor unit shows the best photovoltaic performance with power conversion efficiency over 10%. The results suggest that the alkyl side-chain engineering is an effective strategy to further tuning the optoelectronic properties of WBG copolymers.

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Section: Methodsmentioning

confidence: 99%

Alkyl Side‐Chain Engineering in Wide‐Bandgap Copolymers Leading to Power Conversion Efficiencies over 10%

et al. 2016

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“…As shown in AFM height images (Figure and Figure S6, Supporting Information), PDBT‐T1:SF‐4PDI‐O, PDBT‐T1:SF‐4PDI‐S, and PDBT‐T1:SF‐4PDI‐Se blend films displayed root mean square (RMS) roughness of 1.08, 1.11, and 1.22 nm, respectively, indicative of their smooth and uniform surface morphology favorable for interface contact. As AFM phase images depicted, PDBT‐T1:SF‐4PDI‐O and PDBT‐T1:SF‐4PDI‐S blends demonstrated relatively clear and delicate nanofibrillar structures relative to the PDBT‐T1:SF‐4PDI‐Se counterpart, which is both advantageous for charge transfer and for transport in the former two blends.…”

Section: Resultsmentioning

confidence: 97%

Chalcogen‐Fused Perylene Diimides‐Based Nonfullerene Acceptors for High‐Performance Organic Solar Cells: Insight into the Effect of O, S, and Se

Wang

et al. 2019

Solar RRL

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Three perylene diimide (PDI) tetramers annulated by oxygen (O), sulfur (S), and selenium (Se), named as SF‐4PDI‐O, SF‐4PDI‐S, and SF‐4PDI‐Se, are designed, synthesized, and paired with polymeric donor PDBT‐T1 to construct organic solar cells. The heteroatoms' effects on photoelectric properties, chemical geometry, charge transport, active‐layer morphology, and photovoltaic performance are investigated in detail. These PDI acceptors exhibit a similar absorption profile, whereas the highest occupied molecular orbitals and lowest unoccupied molecular orbitals are simultaneously upshifted when heteroatoms are altered from O and S to Se due to the gradually weakening electronegativity. Alongside PDBT‐T1, SF‐4PDI‐O achieves an outstanding power conversion efficiency of 8.904% with a high fill factor of 0.706, outcompeting its S‐annulated and Se‐annulated counterparts. The superiority of the PDBT‐T1:SF‐4PDI‐O system lies in its stronger crystallinity, more balanced hole and electron mobilities, and weaker bimolecular recombination, coupled with more efficient charge transfer and collection. These results shed light on the invention of high‐performance PDI acceptors by oxygen‐decorated methodology.

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“…And it also has a higher transparency within the scope of visible among the diverse metal oxide nanoparticles [19][20][21], thus comprehensively select cadmium-doped ZnO (termed hereafter CZO) by mole ratio as a fantastic ETL in solar cell applications is well option. 3 In view of previous discussion and research, we demonstrated a study based on a structure of inverted device is ITO/ETL/active layer/HTL/metal cathode in this paper, the Cd-doped ZnO nanoparticles of different concentrations (2.5%, 5%, 10%) by a facile wet chemistry synthetic protocol as ETL. The internal doping of metal ions in ZnO is a method, which can effectively reduce surface charge recombination and improve electron extraction.…”

mentioning

confidence: 89%

“…because of its solution processable, inexpensive and convenience and extensive roll-to-roll manufacturing [1][2][3][4][5][6][7][8][9][10]. Most of them are developing rapidly, with PCE exceeding 14% of single solar cells [11], and of 17% with tandem PSCs [12].…”

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confidence: 99%

Solution-processible Cd-doped ZnO nanoparticles as an electron transport layer to achieve high performance polymer solar cells through improve conductivity and light transmittance

Ren

Qing

et al. 2019

Preprint

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In this work, electron transport layers (ETLs)with high charge transfer ability was fabricated by doping ZnO nanoparticles with different concentrations of cadmium. The performance for an inverted polymer solar cell based on PTB7-Th: PC71BM with 5% cadmium doping of zinc oxide nanoparticles (CZO) ETL is better than pure ZnO,which can enhance the short-circuit current (J SC), from 16.30 mA/cm2 to 17.15 mA/cm2, the fill factor (FF) from 64.45% to 69.38%, power conversion efficiency（PCE）from 8.09% to 9.28%. It's consequence of performance stems from curbing interfacial charge recombination and effective charge extraction. Meanwhile, Taking a series of characterization methods, such as atomic force microscopy (AFM), the space charge limited current (SCLC), transmittance, the charge dissociation probabilities (P(E,T)), photo-electrochemical impedance spectroscopy (EIS). The results indicate that the electrical conductivity and transmittance of the films are improved by incorporation of Cd in the ZnO film, restrained surface charge recombination and enhanced the electron-transport capability. Therefore, the ETL of Cd-doped will be an ideal candidate for future optoelectronic devices.

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High‐Performance Non‐Fullerene Organic Solar Cells Based on a Selenium‐Containing Polymer Donor and a Twisted Perylene Bisimide Acceptor

Cited by 78 publications

References 37 publications

Alkyl Side‐Chain Engineering in Wide‐Bandgap Copolymers Leading to Power Conversion Efficiencies over 10%

Alkyl Side‐Chain Engineering in Wide‐Bandgap Copolymers Leading to Power Conversion Efficiencies over 10%

Chalcogen‐Fused Perylene Diimides‐Based Nonfullerene Acceptors for High‐Performance Organic Solar Cells: Insight into the Effect of O, S, and Se

Solution-processible Cd-doped ZnO nanoparticles as an electron transport layer to achieve high performance polymer solar cells through improve conductivity and light transmittance

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