Modification of a ZnO cathode by doping it with hydroxyl-containing derivative - giving ZnO-C60 provides fullerene-derivative-rich surface and enhanced electron conduction. Inverted polymer solar cells the display markedly improved power conversion efficiency compared to those pristine cathode, especially when active layer includes low-bandgap PTB7-Th.

We present high efficiency and stable inverted PSCs (i-PSC) by employing sol-gel processed simultaneously doped ZnO Indium fullerene derivative (BisNPC60-OH) (denoted as InZnO-BisC60) film cathode interlayer PTB7-Th:PC71BM the active layer (where PTB7-Th is a low bandgap polymer we proposed previously). This dual-doped ZnO, InZnO-BisC60, shows dual opposite gradient dopant concentration profiles, being rich in at surface contact with In ITO surface. Such doping not only gives improved...

We report a new route for the design of electroluminescent polymers by grafting high-efficiency phosphorescent organometallic complexes as dopants and charge transport moieties onto alky side chains fully conjugated polymer light-emitting diodes (PLED) with single layer/single polymers. The system studied involves polyfluorene (PF) base polymer, carbazole (Cz) moiety source green emission forming an electroplex PF main chain, cyclometalated iridium (Ir) dopant. Energy transfer from Ir...

Abstract Solution‐processed organic light‐emitting diodes (OLEDs) with thermally activated delayed fluorescent (TADF) material as emitter have attracted much attention because of their low cost and high performance. However, exciton quench at the interface between hole injection layer, poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS), emitting layer (EML) in devices can lead to device Here, a novel triplet energy (2.89 eV) crosslinkable hole‐transporting grafted oxetane...

We report a new route for the design of efficient soluble electroluminescent PPV-based copolymers bearing electron-deficient oxadiazole (OXD) moieties on side chains. The introduction OXD through long alkylene spacer with PPV backbone provides molecular dispersion in film; both chain and main do retain their own electron-transport emissive properties, respectively. use phenylene vinylene derivatives asymmetric branched substituents solubility ease device fabrication as well amorphous...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTWater-Soluble Self-Acid-Doped Conducting Polyaniline: Structure and PropertiesShow-An Chen Gue-Wuu HwangCite this: J. Am. Chem. Soc. 1995, 117, 40, 10055–10062Publication Date (Print):October 1, 1995Publication History Published online1 May 2002Published inissue 1 October 1995https://pubs.acs.org/doi/10.1021/ja00145a017https://doi.org/10.1021/ja00145a017research-articleACS PublicationsRequest reuse permissionsArticle...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and Properties of Poly(acrylic acid)-Doped PolyanilineShow-An Chen Hsun-Tsing LeeCite this: Macromolecules 1995, 28, 8, 2858–2866Publication Date (Print):April 1, 1995Publication History Published online1 May 2002Published inissue 1 April 1995https://pubs.acs.org/doi/10.1021/ma00112a035https://doi.org/10.1021/ma00112a035research-articleACS PublicationsRequest reuse permissionsArticle Views1588Altmetric-Citations196LEARN ABOUT THESE...

Bilayer polymer light-emitting diodes with two blue materials, poly(N-vinylcarbazole) (PVK) and poly(2-dodecyl-p-phenylene) (C12O-PPP), can emit or white light, depending on the solvent used in fabrication of second layer, C12O-PPP. If hexane (the nonsolvent for PVK) is used, device emits light as a single layer However, if toluene cosolvent polymers) originating from an exciplex emission at bilayer interface addition to exciton At low temperatures, intensity drops that becomes dominant.

Dipping pristine poly(9,9-di-n-octylfluorene) film into a mixed solvent/ nonsolvent THF/MeOH transforms the conformation of minor amorphous-phase chains to β-phase conformers (see figure) with controllable content. The β phase acts as dopant and causes electron trapping promoted hole mobility. It allows efficient energy transfer charge thus achieves pure-blue electroluminescence enhanced device performance.

We present a novel electron transport (ET) polymer composed of polyfluorene grafted with K+-intercalated crown ether involving six oxygen atoms (PFCn6:K+) for bulk-heterojunction solar cells (PSCs) regioregular poly(3-hexylthiophene) (P3HT) as the donor and indene–C60 bisadduct (ICBA) or indene–[6,6]-phenyl-C61-butyric acid methyl ester (IPCBM) acceptor in active layer Al Ca/Al cathode. A remarkable improvement power conversion efficiency (PCE) (measured air) was observed upon insertion this...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of Water-Soluble Self-Acid-Doped PolyanilineShow-An Chen and Gue-Wuu HwangCite this: J. Am. Chem. Soc. 1994, 116, 17, 7939–7940Publication Date (Print):August 1, 1994Publication History Published online1 May 2002Published inissue 1 August 1994https://pubs.acs.org/doi/10.1021/ja00096a078https://doi.org/10.1021/ja00096a078research-articleACS PublicationsRequest reuse permissionsArticle Views1334Altmetric-Citations142LEARN ABOUT THESE...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyaniline Doped by the New Class of Dopant, Ionic Salt: Structure and PropertiesShow-An Chen Liang-Chang LinCite this: Macromolecules 1995, 28, 4, 1239–1245Publication Date (Print):February 1, 1995Publication History Published online1 May 2002Published inissue 1 February 1995https://pubs.acs.org/doi/10.1021/ma00108a062https://doi.org/10.1021/ma00108a062research-articleACS PublicationsRequest reuse permissionsArticle...

We propose a simple way to achieve pure blue emission and improved device efficiency via capping poly(9,9-dioctylfluorene) (PFO) with electron-deficient moieties (EDMs, such as oxadiazole (OXD) triazole (TAZ)), which can induce minor amount of long conjugating length species (regarded beta phase) control extents energy transfer from amorphous matrix the phase. The PFO end-capped TAZ is higher than that para-tert-butyl phenyl (TBP) by factor 2 (with CsF/Al cathode), its electroluminescent...

We report the conjugated polymer P(tBu-CBP) as a host with high triplet energy (ET 2.53 eV) and suitable HOMO (5.3 LUMO (2.04 levels. Upon doping green red emission Ir-complexes, it gives devices luminous external quantum efficiencies for (23.7 cd/A, 6.57%) (5.1 4.23%), respectively, low turn-on voltage (3 V). For both devices, are higher than those of corresponding same backbone P(3,6-Cz) by factor 4, even though latter has an ET (2.6 slightly that former. The results reflect that, in...

We probed the gelation and its effect on photophysical property of a conjugated semiconducting polymer, poly(9,9-dioctylfluorene-2,7-diyl) (PF8), in toluene. The conformational structure characterized by radius gyration persistence length PF8 dilute toluene solution depended strongly temperature, where chains exhibited more extended conformation as temperature was raised. interchain interaction above overlap concentration induced aggregation to form network clusters solution. Gelation took...

A novel strategy employing core–shell nanowire arrays (NWAs) consisting of Si/regioregular poly(3-hexylthiophene) (P3HT) was demonstrated to facilitate efficient light harvesting and exciton dissociation/charge collection for hybrid solar cells (HSCs). We experimentally demonstrate broadband omnidirectional light-harvesting characteristics NWA HSCs due their subwavelength features, further supported by the simulation based on finite-difference time domain analysis. Meanwhile, geometry...

Abstract In the past few years, tremendous progress in power conversion efficiency (PCE) of polymer solar cell (PSC) via design novel conjugated polymers has been made. order to further promote PCE, an efficient way is narrow down optical band gap polymers. This review focuses on low based Donor—Acceptor (D—A) strategy and quinoid form structure. At first, we introduce requirements for polymers, such as tuning energy levels. Second, importance main chain, side chain substituents, which...

We report a promising oxadiazole-containing phenylene vinylene ether-linkage copolymer, which can emit nearly white light from single-layer light-emitting diode. The emission spectrum is composed of red component originating the new excited dimer in addition to blue-green an individual lumophore and excimer. This formed under strong electric field inside diode cannot be produced by photoexcitation, different excimer or exciplex that often found both photoluminescence electroluminescence, it...

Self-doped sulfonic acid ring-substituted polyaniline (SPAN) reported so far is only slightly soluble in water. This work reports the synthesis route of SPAN water with a solid content at least 50% by weight, which stable (without precipitation) for more than 1 year and can be cast into free-standing films. The protons on bound groups dope imine nitrogens both its aqueous form as film evidenced presence polaron absorption bands UV−vis spectra free spins from ESR measurement. Titration...

Abstract Urethane reactions of phenyl isocyanate alcohol systems with toluene as solvent and various aprotic polar solvents (including tertiary amines) additives were carried out at constant temperature 10–40°C. Analysis the variation second order rate constants these those available in literature indicates that formation hydrogen bonding complexes (alcohol solvent) electron donor number (DN) are two factors allowing satisfactory explanation catalysis inhibition effects wide range amines,...

Polymer solar cells (PSCs) based on fullerene derivatives often require additives to optimize active layer morphology. Here, the novel additive 1‐naphthalenethiol (SH‐na) is proposed for processing PSC of PTB7:PC 71 BM. Spin‐casting with SH‐na as achieves a power conversion efficiency (PCE) 7.3%, compared 6.7% preparations containing conventional 1,8‐diiodooctane additive. Dipping into methanol solution critical concentration increases PCE further 8.75%. This mainly due an improved...