Selenophene-Incorporated Quaterchalcogenophene-Based Donor–Acceptor Copolymers To Achieve Efficient Solar Cells with Jsc Exceeding 20 mA/cm2

Cao, Fong Yi; Tseng, Cheng Chun; Lin, Fang Yu; Chen, Yuzhong; Yan, He; Cheng, Yen‐Ju

doi:10.1021/acs.chemmater.7b03688

Cited by 45 publications

(32 citation statements)

References 64 publications

(83 reference statements)

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“…All chemicals were used without further purification. PFBT2Se2Th was prepared according to previous publication, via copolymerization of 4,7-Bis(5-bromo-4-(2-octyldodecyl)selenophen-2-yl)-5,6-difluorobenzothiadiazole (FBT2Se) and 5,5′-bis(trimethylstannyl)-2,2′-bithiophene (2Th) [41].…”

Section: Methodsmentioning

confidence: 99%

Mg Doped CuCrO2 as Efficient Hole Transport Layers for Organic and Perovskite Solar Cells

et al. 2019

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The electrical and optical properties of the hole transport layer (HTL) are critical for organic and halide perovskite solar cell (OSC and PSC, respectively) performance. In this work, we studied the effect of Mg doping on CuCrO2 (CCO) nanoparticles and their performance as HTLs in OSCs and PSCs. CCO and Mg doped CCO (Mg:CCO) nanoparticles were hydrothermally synthesized. The nanoparticles were characterized by various experimental techniques to study the effect of Mg doping on structural, chemical, morphological, optical, and electronic properties of CCO. We found that Mg doping increases work function and decreases particle size. We demonstrate CCO and Mg:CCO as efficient HTLs in a variety of OSCs, including the first demonstration of a non-fullerene acceptor bulk heterojunction, and CH3NH3PbI3 PSCs. A small improvement of average short-circuit current density with Mg doping was found in all systems.

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Section: Methodsmentioning

confidence: 99%

Mg Doped CuCrO2 as Efficient Hole Transport Layers for Organic and Perovskite Solar Cells

et al. 2019

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“…On the one hand, selenophene has more reduced aromaticity and stronger electron‐donating capability, which are beneficial to increase quinoidal character, improve backbone planarity, extend conjugation length, and lower optical bandgap . On the other hand, selenium atom in selenophene has greater polarizability and larger size than sulfur atom in thiophene, which enabled selenophene to have a tendency to induce intermolecular selenium–selenium interactions or selenium–aromatic interactions . Enlightened by these attractive advantages of selenophene over thiophene, our group developed an asymmetric A–D–A‐type nonfullerene SMA SePT‐IN by substituting one sulfur atom of symmetric TPT‐IN with a selenium atom.…”

Section: Asymmetric A–d–a‐type Nonfullerene Smasmentioning

confidence: 99%

Asymmetric Nonfullerene Small Molecule Acceptors for Organic Solar Cells

Xia

et al. 2019

Advanced Energy Materials

203

164

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EDPD acceptors, respectively. Since then, several promising asymmetric nonfullerene SMAs have been developed to pair with the polymer donor P3HT. [39][40][41][42][43] However, the development of asymmetric nonfullerene SMAs remained nearly stagnant from 2015 to 2016. This unfavorable situation has changed when asymmetric nonfullerene SMAs began to emerge in 2017 and experienced rapid development in the past 3 years. [32][33][34][35][36][37] In addition to maintaining the advantages of symmetric nonfullerene SMAs, [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] such as chemical structure diversity and good adjustability in photoelectrical properties, asymmetric nonfullerene SMAs may additionally exhibit stronger intermolecular binding energy and larger dipole moment than symmetric nonfullerene SMA counterparts. [33,35,44] Both stronger intermolecular binding energy and larger dipole moment are beneficial to reinforce intermolecular interaction, rendering asymmetric nonfullerene SMAs a promising class of nonfullerene SMAs to increase the fill factor (FF) and power conversion efficiency (PCE) in OSCs. To date, the PCEs of OSCs based on asymmetric nonfullerene SMAs have gradually increased from 1.27% in 2010 to nearly 14% in 2019. [31,38] There have been a large number of review articles summarizing the recent development of symmetric nonfullerene SMAs. [13][14][15][16][17][18][45][46][47][48][49][50][51] However, to the best of our knowledge, there has been no one review article specially focusing on asymmetric nonfullerene SMAs so far. Given the significant progress achieved recently for asymmetric nonfullerene SMAs, it is timely to briefly review the development of asymmetric nonfullerene SMAs in the past decade. Here, we first summarize the recent advances of asymmetric nonfullerene SMAs, including early reports of asymmetric nonfullerene SMAs, asymmetric PDI-based nonfullerene SMAs, and asymmetric acceptor-donor-acceptor (A-D-A)-type nonfullerene SMAs. Finally, we discuss the structure-property relationships and the perspectives for future development of asymmetric nonfullerene SMAs. Early Reports of Asymmetric Nonfullerene SMAsIn view of the shortcomings of asymmetric fullerene SMAs, some attempts have been made to develop asymmetric nonfullerene SMAs with easy access, tunable optical/electrochemical properties, and wide possibility of functionalization. [39][40][41][42][43] Generally, these asymmetric nonfullerene SMAs could be Symmetry breaking provides a new material design strategy for nonfullerene small molecule acceptors (SMAs). The past 10 years have witnessed significant advances in asymmetric nonfullerene SMAs in organic solar cells (OSCs) with power conversion efficiency (PCE) increasing from ≈1% to ≈14%. In this review, the progress of asymmetric nonfullerene SMAs, including early reports of asymmetric nonfullerene SMAs, asymmetric PDI-based nonfullerene SMAs, and asymmetric acceptor-donor-acceptor (A-D-A)-type nonfullerene SMAs, is summarized. The structure-property relation...

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“…[9] Many such polymers are alternating in nature, pairing chalcogenophene units as electron-rich donors with electron-deficient acceptor substituents following a "donor-acceptor" strategy to tune frontier molecular orbitals. [10,11] Examples include mixed chalcogenophene copolymers such as selenophene-incorporated quaterchalcogenophenes, platinum-acetylide copolymers with chalcogenophenes, and furan-flanked diketopyrrolopyrrole-based chalcogenophene copolymers. [11][12][13] The most studied and most ubiquitous chalcogenophene monomer is thiophene.…”

Section: Introductionmentioning

confidence: 99%

“…[10,11] Examples include mixed chalcogenophene copolymers such as selenophene-incorporated quaterchalcogenophenes, platinum-acetylide copolymers with chalcogenophenes, and furan-flanked diketopyrrolopyrrole-based chalcogenophene copolymers. [11][12][13] The most studied and most ubiquitous chalcogenophene monomer is thiophene. It is more stable than furan and is an abundant petroleum feedstock, as opposed to heavier chalcogenophenes.…”

Section: Introductionmentioning

confidence: 99%

Trends in Conjugated Chalcogenophenes: A Theoretical Study

Topolskaia

Pollit

Cheng

et al. 2021

Chemistry A European J

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Heavy atom substitution in chalcogenophenes is a versatile strategy for tailoring and ultimately improving conjugated polymer properties. While thiophene monomers are commonly implemented in polymer designs, relatively little is known regarding the molecular properties of the heavier chalcogenophenes. Herein, we use density functional theory (DFT) calculations to examine how group 16 heteroatoms, including the radioactive polonium, affect polychalcogenophene properties including bond length, chain twisting, aromaticity, and optical properties. Heavier chalcogenophenes are more quinoidal in character and consequently have reduced band gaps and larger degrees of planarity. We consider both the neutral and radical cationic species. Upon p-type doping, bond length rearrangement is indicative of a more delocalized electronic structure, which combined with optical calculations is consistent with the polaron-model of charge storage on conjugated polymer chains. A better understanding of the properties of these materials at their molecular levels will inevitably be useful in material design as the polymer community continues to explore more main group containing polymers to tackle issues in electronic devices.

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Selenophene-Incorporated Quaterchalcogenophene-Based Donor–Acceptor Copolymers To Achieve Efficient Solar Cells with J_sc Exceeding 20 mA/cm²

Cited by 45 publications

References 64 publications

Mg Doped CuCrO2 as Efficient Hole Transport Layers for Organic and Perovskite Solar Cells

Mg Doped CuCrO2 as Efficient Hole Transport Layers for Organic and Perovskite Solar Cells

Asymmetric Nonfullerene Small Molecule Acceptors for Organic Solar Cells

Trends in Conjugated Chalcogenophenes: A Theoretical Study

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