Enhancing efficiency with fluorinated interlayers in small molecule organic solar cells

Han, Hsieh-Cheng; Tseng, Chi-Ang; Du, Chan-Yi; Ganguly, Abhijit; Chong, Cheong-Wei; Wang, Shengbo; Lin, Chi‐Feng; Chang, Sheng Hsiung; Su, Chaochin; Lee, Jiun-Haw; Chen, Kuei‐Hsien; Chen, Li‐Chyong

doi:10.1039/c2jm34091g

Cited by 21 publications

(14 citation statements)

References 25 publications

(27 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, γ s was evaluated using the O–W geometric equation method. [ 56–58 ] As shown in the images, the WCAs did not considerably differ. The hydrophobicity demonstrates the efficient charge transport between the active layers due to the effects of the halogenated atoms.…”

Section: Resultsmentioning

confidence: 62%

Nonhalogenated Solvent‐Processed Thick‐Film Ternary Nonfullerene Organic Solar Cells with Power Conversion Efficiency >13% Enabled by a New Wide‐Bandgap Polymer

et al. 2021

View full text Add to dashboard Cite

Although several donor polymers have been synthesized for use in nonfullerene organic solar cells (NFOSCs), the number of efficient π‐conjugated donor polymers compatible with nonhalogenated solvent‐processed thick active layer NFOSCs is limited. Two wide‐bandgap π‐conjugated donor polymers functionalized with a siloxane side chain, P1 (chlorine‐free) and P2 (chlorinated), are designed and synthesized. The siloxane‐functionalized side chains and/or Cl π‐conjugated donor polymers increase the absorption coefficients, reduce the energy losses, increase the charge‐carrier mobility, and suppress the bimolecular recombination, which are beneficial to achieve high‐performance thick‐film ternary NFOSCs. Toluene‐processed devices based on P2:IT‐4F:BTP‐4Cl, and P2:IT‐4F:BTP‐4F exhibit high power conversion efficiencies (PCEs) of 13.25% and 11.02% with fill factors (FFs) of 70.03% and 71.60%, respectively. A P2:IT‐4F binary NFOSC exhibits a PCE of 10.38% with an FF of 69.78%, lower than that of the ternary NFOSC. The ternary device PCE of 13.25% is achieved using a 300 nm‐thick active layer, indicating that the siloxane‐functionalized side‐chain π‐conjugated polymer easily controls the bulk heterojunction blend film thickness of the NFOSC. The findings may potentially aid the development of nonhalogenated solvent‐processed thick‐film ternary NFOSCs that can satisfy future production requirements.

show abstract

Section: Resultsmentioning

confidence: 62%

Nonhalogenated Solvent‐Processed Thick‐Film Ternary Nonfullerene Organic Solar Cells with Power Conversion Efficiency >13% Enabled by a New Wide‐Bandgap Polymer

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Therefore, the device efficiency reached 3.14%, which was equal to that with PEDOT:PSS. Chen and co‐workers reported a fluorinated AIM with triethoxysilane functional group, (heptadecafluoro‐1,1,2,2‐tetra‐hydrodecyl) triethoxysilane (PFAS, Scheme ) for use in pentacene/C 60 bilayer OSCs . The CF groups in PFAS induced a dipole moment at the anode interface and increased the built‐in potential, thus improving the hole transport and electron blocking efficiency.…”

Section: Small Molecule Anode Interlayermentioning

confidence: 99%

Small Molecule Interlayers in Organic Solar Cells

Zhang

Usman

2018

Advanced Energy Materials

View full text Add to dashboard Cite

This review provides an up‐to‐date review about the small molecule interlayers (SMIs) in organic solar cells (OSCs). Compared to polymer interlayers, SMIs exhibit intrinsic advantages such as easy synthesis and purification, monodispersity, well‐defined chemical structure, and high batch‐to‐batch reproducibility. Recently, various SMIs have been reported with landmark efficiencies of over 10% in both conventional and inverted OSCs, exhibiting promising potential in commercial application. In this review, the authors summarize the progress of SMIs from a device fabrication point of view, paying particular attention to the material categories, molecular design, preparation process, and applicable device structure. In addition, the working mechanisms of different SMIs are also discussed, including the structure–property relationships and the corresponding impact on device performance. Finally, a brief outlook is provided that includes opportunities and challenges in this emerging area.

show abstract

“…The latter films could be influenced several factors during the drying process including the fraction of solid content, particle size, proportion of PSS and the solution viscosity which could lead to different morphological and electrical properties [19]. Moreover, the solar cell performance is mainly determined by the amount known as the power conversion efficiency (PCE) which depends on several parameters such as light harvesting of the active layer, excitons generation, diffusion, separation, transportation and collection by the electrodes [20]. Organic solar cell (OSC) devices, fabricated from the blends of Poly[[9-(1-octylnonyl)-9H-carbazole-2,7-diyl]-2,5-thiophenediyl-2,1,3-benzothiadiazole-4,7-diyl-2,5-thiophenediyl]: [6,6]-phenyl-C71-butyric acid methyl esters (PCDTBT:PC 71 BM) bulk heterojunction systems has relatively good photovoltaic (PV) properties compared to other bulk heterojunction OSCs [21].…”

Section: Introductionmentioning

confidence: 99%