|
个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：无
其他任职：精细化工国家重点实验室副主任、大连理工大学-瑞典皇家工学院分子器件联合研究中心主任
性别：男
毕业院校：大连理工大学
学位：博士
所在单位：化工学院
学科：应用化学. 精细化工
办公地点：大连理工大学西部校区化工实验楼E-223
联系方式：0411-84986493
电子邮箱：sunlc@dlut.edu.cn
Singlet Fission from Upper Excited Electronic States of Cofacial Perylene Dimer
点击次数：
论文类型：期刊论文
发表时间：2019-05-16
发表刊物：JOURNAL OF PHYSICAL CHEMISTRY LETTERS
收录刊物：PubMed、SCIE、EI
卷号：10
期号：10
页面范围：2428-2433
ISSN号：1948-7185
关键字：Electronic states; Excited states; Polycyclic aromatic hydrocarbons, Dimer cations; Energy thresholds; Excited electronic state; Higher efficiency; Internal conversions; Relaxed state; Time-scales; Vibrational cooling, Singlet fission
摘要：Singlet fission directly from the upper excited vibrational and electronic states of cofacial perylene dimers, bypassing the relaxed state S-1, was detected within 50 fs. This process competes well with vibrational cooling in S-1 (4.7-7.0 ps) and S-2 -> S-1 internal conversion (380 fs). The singlet fission has the energy threshold E = 3.06 eV. Other competitive relaxation processes are excimer and dimer cation formation on an ultrafast time scale. Excitation to higher energy levels (4.96 eV) leads to a higher efficiency of singlet fission.