Synthetically facile organic solar cells with >4% efficiency using P3HT and a silicon phthalocyanine non-fullerene acceptor

Abstract

We demonstrate organic photovoltaic devices with extremely low synthetic complexity by paring poly(3-hexithiophene) (P3HT) with a novel non-fullerene acceptor (NFA) bis(tri-n-propylsilyl oxide) silicon phthalocyanine ((3PS)2-SiPc). (3PS)2-SiPc possesses a relatively unique...

Metal phthalocyanines: thin-film formation, microstructure, and physical properties

“…168,171 Typically STXM is used for largescale features (10 nm to 5 mm) and similar to GISAXS has found the most utility in lms consisting of polymer and small molecule-polymer blends. [171][172][173] Orientation and order mapping of single-component thin-lms is achieved by polarized STXM measurements. Different molecular orientations with respect to the polarization axis can be determined by tuning the photon energy to a specic dichroic NEXAFS resonance while measurements with a linearly or elliptically polarized X-ray beam provide contrast between molecules.…”

“…168,171 Therefore making STXM a useful tool for large area visualization of organic thin-lms with recent use demonstrated in analyzing the composition of bis(tri-n-propylsilyl oxide) SiPc/ poly-(3-hexithiophene) blends in thin-lms. 173…”

Variance-resistant PTB7 and axially-substituted silicon phthalocyanines as active materials for high-Voc organic photovoltaics

“…Axially substituted silicon phthalocyanines (R 2 -SiPc) are ideal candidates for low-cost, high- Voc acceptor materials 24 , 26 , 27 . While metal phthalocyanine (MPc) have been investigated in organic electronic applications for more than 50 year, R 2 -SiPcs are relatively understudied, having emerged in recent years 28 and successfully incorporated in multiple new application, including organic thin-film transistors (OTFTs) 29 – 34 , organic light-emitting diodes (OLEDs) 26 , 35 , 36 and in OPVs 24 , 26 , 37 – 40 .…”

High Voc Fullerene-Free Organic Photovoltaics Composed of PTB7 and Axially-Substituted Silicon Phthalocyanines

“…18 Axially substituted silicon phthalocyanines (R 2 -SiPc) are ideal candidates for low-cost, high-VOC acceptor materials. [21][22][23] While metal phthalocyanine (MPc) have been investigated in organic electronic applications for more than 50 year, R 2 -SiPcs are relatively understudied, having emerged in recent years 24 and successfully incorporated in multiple new application, including organic thin-lm transistors (OTFTs), [25][26][27][28][29][30] organic light-emitting diodes (OLEDs) [31][32][33] and in OPVs 21,31,34−37 . The synthetic complexity (SC) index 38 of R 2 -SiPcs have been calculated to be at least three times lower (SC = 12) 23 than that of several prominent OPV acceptors materials, such as PC 61 BM (SC = 36) 39 , Y6 (SC = 59) 40 and ITIC (SC = 67) 41 .…”

“…yielded a device with an exceptionally high Voc of nearly 1.1 V. 21 There are relatively few reports investigating the use of R 2 -SiPc as stand-alone acceptors in OPVs. [21][22][23] therefore it is vital to investigate pairing these cost-effective molecules with different donor polymers and optimizing these devices to exploit their full potential in OPVs.…”