New Thiophene-Based Organic Photoelectronic Materials Developement and Their Applicaitons

Project Details

Description

Organic thin film transistors (OTFTs) have attracted intensive attention for potentialapplications in flexible displays, low-cost electronic papers. In recent years, my group hasdeveloped facile [X+1+Y] one-pot synthetic routes for DTT (dithienothiophene), BTDT(benzothienodithiophene), TTA (tetrathienoacene), and PTA (pentathienothiophene) preparation.A few new fused-thiophene-based derivatives have been developed for OTFTs. For example, wereported stable soluble BTDT-based materials with 0.65 cm2V-1s-1 mobility fabricated via a solutionprocess (published in 2014 AFM). Details of the newly developed benzothienothiophenes (BTT)with 0.34 cm2V-1s-1 mobility and asymmetric DTTs exhibiting single crystal (SCFET) mobility of 0.7cm2V-1s-1 have also been published in two JMCCs.For recent p-type materials development, we have developed two new soluble smallmolecules which exhibit mobilities of 1.7 and 2.2 cm2V-1s-1, fabricated via a solution process (aimfor JACS). To the best of our knowledge, both will be the Taiwan highest mobility small moleculesvia a solution process.For n-type materials development, we had reported TTAs with mobilities of 0.3 and 0.43cm2V-1s-1, published in AFM 2012 and AEM 2015, respectively. More recently, we have developeda few new air-stable quinoidal molecules. For example, a DTTQ exhibits 0.45 cm2V-1s-1 mobility inair (submitted to AFM). In addition, our new developed DPPQ shows ~0.5 cm2V-1s-1 mobilityfabricated via a shearing process.Notably, these newly developed thiophene-based units can also be applied in OPV and 2PA.For example, our TTA-based small molecules and thioalkylated thiophene-based polymers hasexhibited 4% and 9.4% PCE in OPV, respectively. In addition, our newly developed TTA-basedchromophores exhibited high 2PA properties, up to 3000 GM, which is the highest performance offused-thiophene-based 2PA chromophores.Our newly developed fused-thiophenes also offer good building blocks for DSSCs. Forexample, one of our new developed TTA-based organic dyes exhibited PCE up to 11.2%,which set a new record in Taiwan, beating our previous high of 10.1%. Lastly, our newdeveloped hole transporting layer (HTL) small molecules in Pb-PSC and Sn-PSC exhibited 15.2%and ~6.4% PCE, respectively, which is one of the best HTLs in both PSC (perovskite solar cell).Here in this project, we will continue preparing our newly-developed high-performancematerials for their devices optimization, and then published these good results in high I.F. journals.At the same time, new thiophene-based molecules will be explored for OTFT, DSSC, OPV,2PA/3PA, and PSC. The optical/electronic performance of these new materials will be evaluated.
StatusFinished
Effective start/end date1/08/1731/07/18

UN Sustainable Development Goals

In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This project contributes towards the following SDG(s):

  • SDG 7 - Affordable and Clean Energy
  • SDG 9 - Industry, Innovation, and Infrastructure
  • SDG 17 - Partnerships for the Goals

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