Achieving 15.81% and 15.29% efficiency of all-polymer solar cells based on layer-by-layer and bulk heterojunction structures

Abstract

Wide bandgap polymer donor PM6 and narrow bandgap polymer acceptor PY-IT were selected to construct all-polymer solar cells (all-PSCs) with layer-by-layer (LbL) or bulk heterojunction (BHJ) structure. The additive 1-chloronaphthalene...

Efficient Ternary Polymer Solar Cells with Two Structurally Similar Fullerene-Free Acceptors to Redshift Absorption Peaks and Improve Exciton Dissociation

“…The simple structure of sandwich devices (pristine Y6, pristine BTP-eC9 or Y6:BTP-eC9 (0.5:0.5) as the photoactive layer) were employed to investigate the exciton dissociation efficiency at the D18-Cl/Y6/BTP-eC9 interface. 45 Figure 3b shows the J−V curves measured for devices with pristine Y6 and BTP-eC9 and blend Y6 and BTP-eC9 as the photoactive layer. The J SC is significantly enhanced (0.7 mA cm −2 ) for Y6:BTP-eC9binary device compared to the pristine Y6 device (0.45 mA cm −2 ) and pristine BTP-eC9 device (0.55 mA cm −2 ), indicating efficient exciton dissociation at Y6/BTP-eC9 interface.…”

“…In addition, the PL is significant quenching at the blend Y6 and BTP-eC9 acceptor compared with pristine Y6 and pristine BTP-eC9, indicating that the exciton dissociation occurred at the Y6/BTP-eC9 interface. The simple structure of sandwich devices (pristine Y6, pristine BTP-eC9 or Y6:BTP-eC9 (0.5:0.5) as the photoactive layer) were employed to investigate the exciton dissociation efficiency at the D18-Cl/Y6/BTP-eC9 interface Figure b shows the J – V curves measured for devices with pristine Y6 and BTP-eC9 and blend Y6 and BTP-eC9 as the photoactive layer.…”

Machine learning with quantum chemistry descriptors: predicting the solubility of small-molecule optoelectronic materials for organic solar cells

“…It is well known that the morphology of the photoactive layer is mainly determined by the solubility, crystallinity, and miscibility of donors and acceptors. 23 Layer-bylayer OSCs exhibit great potential in achieving high PCE as reported by Zhang et al 24,25 It is well known that the solubility of optoelectronic materials is important for fabricating layer-bylayer OSCs, and will affect the interface morphology between different layers. Therefore, solubility is a critical physical property of donor and acceptor materials, and should be considered during the design of new high-performance donors and acceptors.…”

Highly sensitive broadband photomultiplication type all-polymer photodetectors and their applications in optical pulse counting

“…The broadband PM-PPDs can be fabricated via PM6 : Y6 (1 : 1.5, wt/wt) acting as an absorber layer and P3HT : PC 71 BM (5 : 100, wt/wt) acting as a multiplication layer, exhibiting a broad spectral response covering the ultraviolet (UV) to the NIR range with a peak EQE value of 1200% under a 10 V applied bias. 23 The absorption spectral range of active layers can be further extended with the development of narrow bandgap materials, 24,25 which is conducive to preparing high-performance broadband PM-PPDs. 26,27 It's challenging to concurrently achieve broad spectral response and relatively large EQE values of PM-PPDs, especially under a small applied bias.…”