944257-56-1Relevant articles and documents
Ligand-Driven Grain Engineering of High Mobility Two-Dimensional Perovskite Thin-Film Transistors
Liang, Aihui,Gao, Yao,Asadpour, Reza,Wei, Zitang,Finkenauer, Blake P.,Jin, Linrui,Yang, Jiaqi,Wang, Kang,Chen, Ke,Liao, Peilin,Zhu, Chenhui,Huang, Libai,Boudouris, Bryan W.,Alam, Muhammad Ashraf,Dou, Letian
supporting information, p. 15215 - 15223 (2021/10/01)
Controlling grain growth is of great importance in maximizing the charge carrier transport for polycrystalline thin-film electronic devices. The thin-film growth of halide perovskite materials has been manipulated via a number of approaches including solvent engineering, composition engineering, and post-treatment processes. However, none of these methods lead to large-scale atomically flat thin films with extremely large grain size and high charge carrier mobility. Here, we demonstrate a novel π-conjugated ligand design approach for controlling the thin-film nucleation and growth kinetics in two-dimensional (2D) halide perovskites. By extending the π-conjugation and increasing the planarity of the semiconducting ligand, nucleation density can be decreased by more than 5 orders of magnitude. As a result, wafer-scale 2D perovskite thin films with highly ordered crystalline structures and extremely large grain size are readily obtained. We demonstrate high-performance field-effect transistors with hole mobility approaching 10 cm2V-1s-1with ON/OFF current ratios of ～106and excellent stability and reproducibility. Our modeling analysis further confirms the origin of enhanced charge transport and field and temperature dependence of the observed mobility, which allows for clear deciphering of the structure-property relationships in these nascent 2D semiconductor systems.
Fused structures in the polymer backbone to investigate the photovoltaic and electrochromic properties of donor-acceptor-type conjugated polymers
Cevher, Sevki Can,Unlu, Naime Akbasoglu,Ozelcaglayan, Ali Can,Apaydin, Dogukan Hazar,Udum, Yasemin Arslan,Toppare, Levent,Cirpan, Ali
, p. 1933 - 1941 (2013/05/21)
In this study, two new benzotriazole (BTz) and dithienothiophene (DTT) containing conjugated polymers were synthesized. After successful characterizations of the monomers by proton-nuclear magnetic resonance ( 1H NMR) and carbon-NMR (13C NMR) techniques, poly(4-(dithieno[3, 2-b:2′,3′-d]thiophen-2-yl)-2-(2-octyldodecyl)- 2H-benzo[d][1,2,3] triazole) P1 and poly(4-(5-(dithieno[3,2-b:2′,3′- d]thiophen-2-yl)thiophen-2-yl)-2-(2-octyldodecyl)-7-(thiophen-2-yl)-2H-benzo[d] [1,2,3]triazole) P2 were synthesized via a typical Stille coupling. Electrochemical and spectroelectrochemical studies showed that both polymers can be multipurpose materials and used in electrochromic and photovoltaic applications. Reported study indicated that incorporation of DTT into the structure leads to fast switching times compared with BTz-based polymers and competent percentage transmittance in the near-infrared region. Multichromism is important in the context of low-cost flexible display device technology and both polymers are ambipolar and processable as well as multichromic. Throughout the preliminary photovoltaic studies, the best performances of photovoltaic devices were found as Voc = 0.49 V, Jsc = 0.83 mA/cm 2, fill factor (FF) = 34.4%, and power conversion efficiency (PCE) = 0.14% for P1, and as Voc = 0.35 V, Jsc = 1.57 mA/cm 2, FF = 38.2%, and PCE = 0.21% for P2. 2013 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013 Benzotriazole- and dithienothiophene-based conjugated polymers were synthesized via Stille coupling. Electrochemical and optical properties of the polymers indicated that the polymers can be great candidates for photovoltaic and electrochromic applications. Therefore, spectroelectrochemical, cyclic voltammetry, and preliminary photovoltaic studies are performed and the results of the studies are highlighted. Copyright
