飛秒超強光雷射化學之研究(I)；有機太陽能電池光物理之研究(II)

Abstract

交通大學應用化學系 計畫名稱：子計畫1.--飛秒超強光雷射化學之研究 研究者：林聖賢 經費來源：行政院國家科學委員會 關鍵詞：超強光雷射；分子游離；分子分解；質譜 超強光雷射(強度大於1012W/cm2)技術已變成一普遍的研究工具。最近，我們發展了 一處理利用超強光雷射游離/分解分子的理論。在本計畫我們將利用此理論來探討使用此 種超強光雷射的分子質譜儀的理論。我們發現利用強光雷射游離/分解分子的速率非常有 效於做為質譜儀的光源，同時也可以做為MALD 的光源。我們也同時利用我們的理論來 研究超強光雷射與分子作用而產生的High-harmonic generation (HHG)。HHG 可提供UV 及X-ray 波長的雷射。我們也將研究利用強光雷射來激發分子的高激發態的理論。 ----------------------------------------------------------------------------------------------- 計畫名稱：子計畫2.--有機太陽能電池光物理之研究 研究者：林聖賢 經費來源：行政院國家科學委員會 關鍵詞：機太陽能電池；電子躍遷；吸收光譜；發光光譜 由於有機太陽能電池的前景看漲，因此關於此類的研究被受重視。但有機太陽能電 池的電子躍遷發生通常少於100 飛秒，在此時間內，振動鬆弛是無法充分完成而達到振 動平衡，因此傳統的電子躍遷理論是無法應用去解釋有機太陽能電池。因此我們發展了 一個新的電子躍遷理論。在本計劃我們準備利用此理論來解釋交通大學刁教授的 Zn-porphyrin/TiO2 體系的實驗結果。我們也要研究染料分子的aggregation 的影響及 anharmonic effect 對光譜及電子轉移的影響。

The Department ofApplied Chemistry, National Chiao-Tung University Title：Part I--Investigations of Famtosecond High Power Laser Chemistry Principal Investigator：Sheng-hsien Lin Sponsor：National Science Council Keywords：Femtosecond high-power laser；molecular ionization；molecular dissociation; mass spectrometry Recently high-power laser (with intensity higher than 1012 W/cm2) techniques have become very popular in chemistry. In this project we shall continue to study the feasibility of developing a new mass spectrometry based on the use of high-power laser which can be employed for not only ionization/dissociation of molecules but also desorption/ionization of molecules from a matrix. For this purpose, we shall employ the theory of high-power laser ionization/dissociation of molecules developed by us. In this project we shall also develop a theory for treating the high-power laser creation of super-excited states of atoms and molecules; some preliminary work on CH4 has been carried out. ------------------------------------------------------------------------------------------------------- Title：Part II--Investigations of Photophysics of Organic Solar Cells Principal Investigator：Sheng-hsien Lin Sponsor：National Science Council Keywords：organic Solar Cells；electron transfer；absorption spectra；fluorescent spectra Due to the important applications of organic solar cells, the studies of photophysical processes in these solar-cell systems have attracted considerable attention. The electron transfer in these systems usually takes place in less than 100 femto-seconds and thus vibrational equilibrium is not established when ET take place. In this case the conventional ET theory (which involves temperature) cannot be used. A new ET theory has been developed in a previous project. A main purpose of this project is to apply this theory to the solar-cell systems of Zn-porphyrins/TiO2 experimentally studied by Prof. Diau’s group. The effect of molecular aggregation on the performance of organic solar cells will be studied by using the molecular excitation theory. Anharmonic effect on photophysical processes in these systems will also be investigated.