Influence of annealing temperature on the nanostructure and performance of polymer: Polymer solar cells

Nam, Sungho; Park, Soohyeong; Seo, Jooyeok; Jeong, Jaehoon; Lee, Soo-Yong; Kim, Joonhyeon; Kim, Hwajeong; Kim, Youngkyoo

doi:10.3938/jkps.63.1368

Cited by 5 publications

(3 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A direct correlation between the formation of such complexes and changes in surface topography and nanostructure of blends was found. 37,38 If the observed miscibility in P3HT:F8BT blends is favored by the polar affinity between the benzothiadiazole and thiophene moieties as we conjecture, EBSA functionalization of the BT moiety would surely jeopardize such interaction leading to the observed morphology changes. A remaining open question is why similar polymer mixtures do not possess such characteristic behavior.…”

Section: ■ Results and Discussionmentioning

confidence: 88%

Ground State Host–Guest Interactions upon Effective Dispersion of Regioregular Poly(3-hexylthiophene) in Poly(9,9-dioctylfluorene-alt-benzothiadiazole)

Casado

Romero

et al. 2015

Macromolecules

View full text Add to dashboard Cite

Regioregular poly(3-hexylthiophene), (rr-P3HT), is widely regarded as an archetypical semiconducting electron-donor polymer in bulk heterojunction solar cells, mainly due to its notable exciton and charge transport properties. Conversely, its use in photonic/lighting devices received little interest owing to its low emission quantum yield in the solid state, related to its large tendency to self-organize into lamellar domains with highly nonemissive character. We present experimental evidence pointing to a large miscibility of P3HT in poly(9,9-dioctylfluorene-alt-benzothiadiazole) (F8BT), accompanied by mutual π–π interactions. Concomitant to this effect, the emission properties of P3HT:F8BT blends, which are attributed to heterogeneous interchain complexes, experience a significant improvement, with photoluminescence quantum efficiency (PLQE) values approaching 25% (almost a 7-fold efficiency enhancement with respect to neat/aggregated rr-P3HT). Our results open up new prospects for improved photonic properties through appropriate control of interchain interactions.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 88%

Ground State Host–Guest Interactions upon Effective Dispersion of Regioregular Poly(3-hexylthiophene) in Poly(9,9-dioctylfluorene-alt-benzothiadiazole)

Casado

Romero

et al. 2015

Macromolecules

View full text Add to dashboard Cite

show abstract

“…Printed silver back electrodes require a post-treatment to enhance the drying rate of the ink and to obtain the proper conditions of sintering by improving the contacts between the nanoparticles. It is well-known that the annealing conditions have a big influence on the performance of polymer solar cells. , To understand the effect of a prolonged thermal sintering of the back electrode on the performance of the solar cells, three different batches of the devices with the following inverted structure ITO/ZnO/P3HT:PCBM/PEDOT:PSS/Ag have been prepared. The full-area back electrodes (cell area 0.089 cm 2 ) were produced by both evaporation and ink-jet printing.…”

Section: Resultsmentioning

confidence: 99%

Photonic Flash Sintering of Ink-Jet-Printed Back Electrodes for Organic Photovoltaic Applications

Polino

Shanmugam

Bex

et al. 2016

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

A study of the photonic flash sintering of a silver nanoparticle ink printed as the back electrode for organic solar cells is presented. A number of sintering settings with different intensities and pulse durations have been tested on both full-area and grid-based silver electrodes, using the complete emission spectrum of the flash lamps from UV-A to NIR. However, none of these settings was able to produce functional devices with performances comparable to those of reference cells prepared using thermally sintered ink. Different degradation mechanisms were detected in the devices with a flash-sintered back electrode. The P3HT:PCBM photoactive layer appears to be highly heat-sensitive and turned out to be severely damaged by the high temperatures generated in the silver layer during the sintering. In addition, UV-induced photochemical degradation of the functional materials was identified as another possible source of performance deterioration in the devices with grid-based electrodes. Reducing the light intensity does not provide a proper solution because in this case the Ag electrode is not sintered sufficiently. For both types of devices, with full-area and grid-based electrodes, these problems could be solved by excluding the short wavelength contribution from the flash light spectrum using a filter. Optimized sintering parameters allowed manufacture of OPV devices with performance equal to those of the reference devices. Photonic flash sintering of the top electrode in organic solar cells was demonstrated for the first time. It reveals the great potential of this sintering method for the future roll-to-roll manufacturing of organic solar cells from solution.

show abstract

“…A thermal annealing method has been proposed for crystalline polymerbased BHJ systems [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] , while an additive method is currently used for less-crystalline (amorphous) polymer-based BHJ layers [37][38][39][40][41][42][43][44][45][46][47] . However, it is doubtable that such an optimized BHJ layer (system) can withstand external physical loads such as pressing, hitting, rubbing and the like when it comes to the fullerene nano-domains dispersed in the polymer:fullerene mixture structures.…”

Section: Introductionmentioning

confidence: 99%

Influence of Physical Load on the Stability of Organic Solar Cells with Polymer : Fullerene Bulk Heterojunction Nanolayers

Lee¹,

Kim²,

Kim³

2016

Current Photovoltaic Research

Self Cite

View full text Add to dashboard Cite

ABSTRACT:We report the effect of physical load on the stability of organic solar cells under physical loads. The active layers in organic solar cells were fabricated with bulk heterojunction films (BHJ) films of poly (3-hexylthiophene) and phenyl-C61-butyric methyl ester. The loading time was varied up to 60 s by keeping the physical load constant. Results showed that the open circuit voltage was not influenced by the physical load but other solar cell parameters were sensitive to the loading time. The fill factor was very slightly increased at 15 s, while short circuit current density was well kept for 30 s. The power conversion efficiency was reasonably maintained for 45 s but became significantly decreased by the continuous loading for 60 s.

show abstract

Influence of annealing temperature on the nanostructure and performance of polymer: Polymer solar cells

Cited by 5 publications

References 28 publications

Ground State Host–Guest Interactions upon Effective Dispersion of Regioregular Poly(3-hexylthiophene) in Poly(9,9-dioctylfluorene-alt-benzothiadiazole)

Ground State Host–Guest Interactions upon Effective Dispersion of Regioregular Poly(3-hexylthiophene) in Poly(9,9-dioctylfluorene-alt-benzothiadiazole)

Photonic Flash Sintering of Ink-Jet-Printed Back Electrodes for Organic Photovoltaic Applications

Influence of Physical Load on the Stability of Organic Solar Cells with Polymer : Fullerene Bulk Heterojunction Nanolayers

Contact Info

Product

Resources

About