Chemical changes in PCPDTBT:PCBM solar cells using XPS and TOF-SIMS and use of inverted device structure for improving lifetime performance

Kettle, Jeff; Waters, Huw; Ding, Ziqian; Horie, Masaki; Smith, Graham C.

doi:10.1016/j.solmat.2015.05.016

Cited by 39 publications

(60 citation statements)

References 21 publications

(40 reference statements)

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“…To improve the performance and to be consistent with other reports, the processing additive 1,8-diiodoctane (DIO) was dissolved into the blend at a concentration of 2.5%. [16][17][18] Prior to coating, the blend was allowed to dissolve for 1 hour on a hot plate at 45 C. Samples were transferred into a nitrogen atmosphere glovebox ([O 2 ], < 1 ppm; [H 2 O], <100 ppm), where the active layers was applied by spin-casting from a 45 C solution. The active layer were annealed at 45 C for 15 minute before thermal evaporation of the cathode was performed through a shadow mask to dene device area and consisted of 8 nm of MoO 3 and 100 nm of silver (Ag).…”

Section: Opv Fabrication and Characterisationmentioning

confidence: 99%

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Efficient solar cells are more stable: the impact of polymer molecular weight on performance of organic photovoltaics

et al. 2016

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Section: Opv Fabrication and Characterisationmentioning

confidence: 99%

“…Devices were kept at open circuit in between measurements and I-V measurements were made every 20 minutes, with more details of the procedure reported elsewhere. 18 This was conducted in accordance with ISOS-L-2 standards. 19 Devices were measured until the PCE reached 10% of its initial value.…”

Section: Opv Fabrication and Characterisationmentioning

confidence: 99%

Efficient solar cells are more stable: the impact of polymer molecular weight on performance of organic photovoltaics

et al. 2016

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“…[35,36] The O1ss pectrum showedt wo peaks that can be assigned to C=Oa nd CÀO peaks. [37,38] Additionally,t he content of C, N, and Oi nt he FONs is 60.7 %, 29.4 %, and 9.9 %, respectively.C learly,i ti sj ust the numerouso xygen-containing and nitrogen-containing functional groups that endow the FONs with excellent water solubility.I na ddition, the NMR detection ( Figures S3-S4 in the Supporting Information) and matrix-assisted laser desorption/ ionization time-of-flight mass spectrometry (MALDI-TOF-MS, Figure S5 ai nt he Supporting Information) also verified the polymerization of 1,6-hexanediold ipropiolatea nd 2,4,6-triazide-1,3,5-triazine under the catalysis of PMDETA.…”

Section: Resultsmentioning

confidence: 99%

An Unconventional Polymerization Route to Hydrophilic Fluorescent Organic Nanoparticles for Multicolor Cellular Bioimaging

Ban

Hou

Sun

et al. 2018

Chemistry An Asian Journal

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We demonstrated an unconventional polymerization route to synthesize hydrophilic fluorescent organic nanoparticles (FONs) for multicolor cellular bioimaging in this contribution. The route benefits from our unexpected discovery of a rapid polymerization reaction between 1,6-hexanediol dipropiolate and 2,4,6-triazide-1,3,5-triazine under the catalysis of N,N,N',N'',N''-pentamethyldiethylenetriamine (PMDETA). Interestingly, the 2,4,6-triazide-1,3,5-triazine and PMDETA system can also induce rapid free radical polymerization at room temperature. The as-prepared FONs exhibited promising water solubility and stability with an average diameter of 20 nm. The excitation wavelength-dependent fluorescent properties endow the FONs with blue, yellow, and red fluorescent emission under UV, blue, and green excitation, respectively. The cytotoxicity of FONs was investigated by using a Cell Counting Kit (CCK-8) assay, which indicated good biocompatiblity. More importantly, the cell uptake experiment verified the FONs were excellent fluorescent nanoprobes for multicolor cellular bioimaging. Therefore, this unconventional route provides a novel fabrication strategy of highly hydrophilic FONs for biomedical applications.

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“…The selection of the proper cell structure can improve the device stability. Kettle et al reported that PCPDTBT:PC 70 BM BHJ films undergo vertical phase separation with ageing . The diffusion of components results in the formation of a PCPDTBT‐enriched region close to the top electrode and a PC 70 BM‐enriched region at the bottom electrode.…”

Section: Morphology Controlmentioning

confidence: 99%

Recent Advances in Morphology Optimization for Organic Photovoltaics

et al. 2018

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Organic photovoltaics are an important part of a next-generation energy-harvesting technology that uses a practically infinite pollutant-free energy source. They have the advantages of light weight, solution processability, cheap materials, low production cost, and deformability. However, to date, the moderate photovoltaic efficiencies and poor stabilities of organic photovoltaics impede their use as replacements for inorganic photovoltaics. Recent developments in bulk-heterojunction organic photovoltaics mean that they have almost reached the lower efficiency limit for feasible commercialization. In this review article, the recent understanding of the ideal bulk-heterojunction morphology of the photoactive layer for efficient exciton dissociation and charge transport is described, and recent attempts as well as early-stage trials to realize this ideal morphology are discussed systematically from a morphological viewpoint. The various approaches to optimizing morphologies consisting of an interpenetrating bicontinuous network with appropriate domain sizes and mixed regions are categorized, and in each category, the recent trends in the morphology control on the multilength scale are highlighted and discussed in detail. This review article concludes by identifying the remaining challenges for the control of active layer morphologies and by providing perspectives toward real application and commercialization of organic photovoltaics.

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Chemical changes in PCPDTBT:PCBM solar cells using XPS and TOF-SIMS and use of inverted device structure for improving lifetime performance

Cited by 39 publications

References 21 publications

Efficient solar cells are more stable: the impact of polymer molecular weight on performance of organic photovoltaics

Efficient solar cells are more stable: the impact of polymer molecular weight on performance of organic photovoltaics

An Unconventional Polymerization Route to Hydrophilic Fluorescent Organic Nanoparticles for Multicolor Cellular Bioimaging

Recent Advances in Morphology Optimization for Organic Photovoltaics

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