Acceptor Donor Acceptor type ionic molecule materials for efficient perovskite solar cells and organic solar cells

被引：83

作者：

Cheng, Ming ^{[1
]}

Aitola, Kerttu ^{[2
]}

Chen, Cheng ^{[3
]}

Zhang, Fuguo ^{[4
]}

Liu, Peng ^{[3
]}

Sveinbjornsson, Kari ^{[2
]}

Hua, Yong ^{[1
]}

Kloo, Lars ^{[3
]}

Boschloo, Gerrit ^{[2
]}

Sun, Licheng ^{[1
,4
]}

机构：

[1] KTH Royal Inst Technol, Organ Chem, Dept Chem, SE-10044 Stockholm, Sweden

[2] Uppsala Univ, Dept Chem, Angstrom Lab, Phys Chem, Box 523, S-75120 Uppsala, Sweden

[3] KTH Royal Inst Technol, Appl Phys Chem, Dept Chem, SE-10044 Stockholm, Sweden

[4] Dalian Univ Technol, DUT KTH Joint Educ & Res Ctr Mol Devices, Inst Artificial Photosynth, State Key Lab Fine Chem, Dalian 116024, Peoples R China

来源：

NANO ENERGY | 2016年 / 30卷

基金：

中国国家自然科学基金;

关键词：

Perovskite solar cell; Organic solar cell; Hole transport material; Donor material; HOLE TRANSPORT MATERIALS; HIGHLY EFFICIENT; HALIDE PEROVSKITES; CONDUCTOR-FREE; ELECTRON; PASSIVATION; HYSTERESIS; LENGTHS; IMPACT; UNIT;

D O I：

10.1016/j.nanoen.2016.10.041

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：

Perovskite solar cells (PSCs) have attracted significant interest and hole transporting materials (HTMs) play important roles in achieving high efficiency. Here, we report additive free ionic type HTMs that are based on 2-ethylhexyloxy substituted benzodithiophene (BDT) core unit. With the ionization of end-capping pyridine units, the hole mobility and conductivity of molecular materials are greatly improved. Applied in PSCs, ionic molecular material M7-TFSI exhibits the highest efficiency of 17.4% in the absence of additives [lithium bis(trifluor-omethanesulfonyl)imide and 4-tert-butylpyridine]. The high efficiency is attributed to a deep highest occupied molecular orbital (HOMO) energy level, high hole mobility and high conductivity of M7-TFSI. Moreover, due to the higher hydrophobicity of M7-TFSI, the corresponding PSCs showed better stability than that of Spiro-OMeTAD based ones. In addition, the strong absorption and suitable energy levels of materials (M6, M7-13r and M7-TFSI) also qualify them as donor materials in organic solar cells (OSCs) and the devices containing M7-TFSI as donor material displayed an efficiency of 6.9%.

引用

页码：387 / 397

页数：11

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