Organic Dyes Incorporating Low-Band-Gap Chromophores for Dye-Sensitized Solar Cells
摘要:
[GRAPHICS]Versatile dyes based on benzothiadiazole and benzoselenadiazole chromophores have been developed that perform efficiently in dye-sensitized solar cells. Power conversion efficiency of 3.77% is realized for a dye in which charge recombination is probably hindered by the nonplanar charge-separated structure.
An organic dye used in a dye-sensitized solar cell is described, having general formula (1):
D-Sp1-Ch-Sp2-Acc-Y (1)
wherein the groups D, Ch, Acc and Y are conjugate with each other, the group D is a donor group, the group Ch is a chromophore rendering low HOMO-LUMO gap or a polyaromatic chromophore, the group Acc is an acceptor group, the group Y is an anchoring group, and each of Sp1 and Sp2 represents a single bond or a spacer group allowing conjugation between the groups D and Ch or between the groups Ch and Acc.
Two-photon absorption (TPA) properties of several novel donor–acceptor–donor (D–A–D) quadrupolar and octupolar star-shaped moleculescontaining peripheral diarylthienylamines were investigated and are discussed in this Letter. The effects of donor–acceptor strength, conjugation length, and molecular symmetry on the effective TPA cross-section of these novel molecules were studied. It was found that
Three sensitizers with N,N-diphenylthiophen-2-amine as the donor were synthesized for use in dye-sensitized solar cells, in which the furan-based sensitizer showed an efficiency of 7.16%.
Synthesis and photovoltaic properties of new [1,2,5]thiadiazolo[3,4-c]pyridine-based organic Broadly absorbing sensitizers for dye-sensitized solar cells
introducing [1,2,5]thiadiazolo[3,4-c]pyridine (PT) as an auxiliary acceptor into the molecular design of organic sensitizers, we have synthesized four new dyes (PT1–PT4) for dye-sensitized solar cells (DSSCs) with triphenylamine or N,N-diphenylthiophen-2-amine as the donor units and thiophene or benzene as the π-bridges, respectively. All the structures, optical and electrochemical properties were fully
在本文中,通过将[1,2,5]噻二唑并[3,4- c ]吡啶(PT)作为辅助受体引入有机敏化剂的分子设计,我们合成了四种新型染料(PT1 - PT4)敏化太阳能电池(DSSC),分别以三苯胺或N,N-二苯基噻吩-2-胺为施主单元,并以噻吩或苯为π桥。充分表征了所有结构,光学和电化学性质。还使用这些染料制造了纳米晶TiO 2染料敏化太阳能电池。其中,基于PT2的DSSC在V oc下表现出最高的整体转换效率,为6.11%在标准光照条件下(100 mW cm -2的模拟AM 1.5太阳光)对鹅去氧胆酸(CDCA)处理后,= 668 mV,J sc = 12.61 mA cm -2,填充因子(FF)= 0.74 。
COMPOUND AND FILM AND PHOTOELECTRIC DIODE AND ORGANIC SENSOR AND ELECTRONIC DEVICE
申请人:Samsung Electronics Co., Ltd.
公开号:US20200136063A1
公开(公告)日:2020-04-30
Disclosed are a compound represented by Chemical Formula 1, a film, a photoelectric diode, an organic sensor, and an electronic device.
In Chemical Formula 1, X
1
, X
2
, Y
1
, Y
2
, Ar, L
1
, L
2
, R
1
, R
4
, and n are the same as defined in the specification.