Contents：

一、演講者：林建村教授
(中央研究院化學所研究員)
學術專長：材料化學、無機化學

二、講題：Organic Materials for High Performance Photovoltaic Cells

三、日期：106年4月17日（星期一），下午12:10至下午2:00

四、地點：化學館C308會議室

五、演講摘要：
Organic sensitizers aiming at better light harvesting and/or better dark current suppression have been synthesized and fabricated as high performance dye-sensitized solar cells. The strategies of dye design include incorporation of an appropriate electron deficient segment, a rigid segment (RS) comprising fused electron-rich and electron-deficient aromatic entities (such as dithieno[3,2-f:2',3'-h]quinoxaline and dithieno[3',2':3,4;2'',3'':5,6]benzo[1,2-d][1,2,3]triazole, or oligo(ethylene oxide) entities in the conjugated spacer connecting the electron donor and the acceptor of dipolar dyes, and incorporation of two anchors in the dye molecules. Theoretical computation together with different physical measurements such as photophysical spectroscopy, cyclic votammetry, electrochemical impedance spectroscopy and electron density extrusion by charge extraction method were used for elucidation of the molecular structure with the DSSC performance. Among the dyes, the best cell efficiencies surpass that of the standard DSSC based on N719.
Heterocyclic quinoid-based hole transporting materials (HTMs), with a rigid quinoid core, 3,6-di(2H-imidazol-2-ylidene)cyclohexa-1,4-diene, have been synthesized. The new HTMs have good hole mobility (>10-4 cm2 V−1 s−1) and very intense absorption (ε > 90000 M-1 cm-1) in the near-infrared region extending to >800 nm. High performance perovskite solar cells can be fabricated using these HTMs without dopant or additive. The best cell efficiency under simulated AM1.5 G illumination reaches 12.22%, which is comparable with that (12.58%) using doped spiro-OMeTAD as the HTM. The cell also exhibits better temporal stability than that of spiro-OMeTAD due to more hydrophobicity of the new hole transporter.

Time：

2017/04/17 12:10 ~ 2017/04/17 14:00

Registration period：

2017/03/20 08:00 ~ 2017/04/12 17:00

Location：

C308