High Photoelectric Quantum Yield in Donor-Acceptor Bulk Heterojunction Organic Solar Cells

被引：1

作者：

Benderskii, V. A. ^{[1
]}

Kats, E., I ^{[2
]}

机构：

[1] Russian Acad Sci, Inst Problems Chem Phys, Chernogolovka 142432, Moscow Oblast, Russia

[2] Russian Acad Sci, Landau Inst Theoret Phys, Chernogolovka 142432, Moscow Oblast, Russia

来源：

HIGH ENERGY CHEMISTRY | 2020年 / 54卷 / 03期

关键词：

organic solar cells; molecular excitons; charge-transfer states; bulk heterojunctions; CHARGE-TRANSFER STATES; NON-FULLERENE ACCEPTORS; EXCITONS; AUTOIONIZATION; SEPARATION; INTERFACE; EFFICIENT; DYNAMICS;

D O I：

10.1134/S0018143920030030

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Reasons behind a higher photoelectric quantum yield in donor-acceptor organic solar cells (D-A--OSCs) than in one-component OSCs have been considered: (1) the appearance of an intense charge-transfer (CT) vibronic band in the absorption spectrum; (2) a change in the spectrum of CT states, in which the molecular exciton (ME) zone is located above the lowest charge-transfer state (LCTS); and (3) a longer lifetime of the LCTS as compared to the ME. Cause 1 makes it possible to select the optimal OCS absorption spectrum corresponding to the solar spectrum, and causes 2 and 3 eliminate the need for fast charge separation in the LCTS, for which the rate by ionization in the bulk heterojunction field is sufficient.

引用

页码：175 / 182

页数：8

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