Stalindurai K.Karuppasamy A.Peng J.-D.Ho K.-C.Ramalingan C.2019-05-172019-05-17201700134686https://scholars.lib.ntu.edu.tw/handle/123456789/408645Described herein is a series of azafluorene ornamented thiazine based novel fused heterocyclic organic dyes TBCPCA-1, TBCPCA-2, TBTCPCA-1 and TBTCPCA-2. Nanocrystalline titania based DSSC performance along with photophysical/electrochemical behaviors of the aforementioned dyes have been examined. Utilizing computational approach, distribution of electrons within the molecules has been explored. The devices possessing the novel fused dyes TBCPCA-1, TBCPCA-2, TBTCPCA-1 and TBTCPCA-2 as sensitizers exhibited overall power conversion efficiency range between 6.17?¡Ó?0.4 and 7.97?¡Ó?0.3%. The novel fused heterocyclic organic dyes featuring di-tert-butylazafluorene structural motif such as TBCPCA-1 and TBCPCA-2 exhibit higher power conversion efficiency than the ones carrying sterically congested tetra-tert-butyl-tri(azafluorene) scaffold viz., TBTCPCA-1 and TBTCPCA-2. Amongst the devices fabricated with the utilization of novel heterocyclic dyes as sensitizers, the device possessing the dye TBCPCA-2 as sensitizer displayed the highest power conversion efficiency of 7.97?¡Ó?0.3% along with a Voc of 745?¡Ó?0.6?mV, a Jsc of 16.92?¡Ó?0.3?mA.cm?2 and a ff of 0.67?¡Ó?0.003. ? 2017 Elsevier LtdAzafluoreneHeterocyclesOrganic dyesPowerconversionefficiencySolar cells[SDGs]SDG7Conversion efficiency; Dye-sensitized solar cells; Efficiency; Nanocrystals; Solar cells; Azafluorene; Computational approach; Heterocycles; Nanocrystalline titania; Organic dye; Overall power conversion efficiency; Power conversion efficiencies; Powerconversionefficiency; Organic compoundsjournal article10.1016/j.electacta.2017.06.1512-s2.0-85021724630https://www.scopus.com/inward/record.uri?eid=2-s2.0-85021724630&doi=10.1016%2fj.electacta.2017.06.151&partnerID=40&md5=6bf475d572b4b89ed23bffc85805c19f