Heo, Dong Uk Kim, Sun Jae Yoo, Beom Jin Kim, Boeun Ko, Min Jae Cho, Min Ju Choi, Doug Hoon 2024-01-20T12:32:56Z 2024-01-20T12:32:56Z 2022-01-25 2013-04 0253-2964 https://pubs.kist.re.kr/handle/201004/128172 Two new metal-free organic dyes bridged by anthracene-mediated it-conjugated moieties were successfully synthesized for use in a dye-sensitized solar cell (DSSC). A N,N-diphenylthiophen-2-amine unit in these dyes acts as an electron donor, while a (E)-2-cyano-3-(thiophen-2-yl)acrylic acid group acts as an electron acceptor and an anchoring group to the TiO2 electrode. The photovoltaic properties of (E)-2-cyano-3-(5-((10-(5-(diphenylamino)thiophen-2-yl)anthracen-9-yl)ethynyl)thiophen-2-yl)acrylic acid (DPATAT) and (E)-2-cyano-3-(5'-((10-(5-(diphenylamino)thiophen-2-yl)anthracen-9-yl)ethynyl)-2,2'-bithiophen-5-yl)acrylic acid (DPATABT) were investigated to identify the effect of conjugation length between electron donor and acceptor on the DSSC performance. By introducing an anthracene moiety into the dye structure, together with a triple bond and thiophene moieties for fine-tuning of molecular configurations and for broadening the absorption spectra, the short-circuit photocurrent densities (J(sc)), and open-circuit photovoltages (V-oc) of DSSCs were improved. The improvement of J(sc) in DSSC made of DPATABT might be attributed to much broader absorption spectrum and higher molecular extinction coefficient (epsilon) in the visible wavelength range. The DPATABT-based DSSC showed the highest power conversion efficiency (PCE) of 3.34% (eta(max) = 3.70%) under AM 1.5 illumination (100 mW cm(-2)) in a photoactive area of 0.41 cm(2), with the J(sc) of 7.89 mA cm(-2), the V-oc of 0.59 V, and the fill factor (FF) of 72%. In brief, the solar cell performance with DPATABT was found to be better than that of DPATAT-based DSSC. English WILEY-V C H VERLAG GMBH Donor-pi-Acceptor Type Diphenylaminothiophenyl Anthracene-mediated Organic Photosensitizers for Dye-sensitized Solar Cells Article 10.5012/bkcs.2013.34.4.1081 1 BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.34, no.4, pp.1081 - 1088 BULLETIN OF THE KOREAN CHEMICAL SOCIETY 34 4 1081 1088 N scie scopus kci ART001761926 000318748000014 2-s2.0-84877769522 Chemistry, Multidisciplinary Chemistry Article HIGH-EFFICIENCY CONJUGATION IMPEDANCE FILM Dyes-sensitized solar cells Anthracene N,N-Diphenylthiophen-2-amine Conjugation length Power conversion efficiency