Improved power conversion efficiency by insertion of RGO–TiO2 composite layer as optical spacer in polymer bulk heterojunction solar cells

Sharma, Ganesh D.; Кештов, М. Л.; Khokhlov, A. R.; Tasis, Dimitrios; Galiotis, Costas

doi:10.1016/j.orgel.2013.11.027

Cited by 21 publications

(13 citation statements)

References 82 publications

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“…Since the solar power exhibits inherent advantages of clean, noiseless, and non-pollution energy, various solar cells were reported [5][6][7]. In recent years, polymer solar cells (PSCs) have attracted the most attentions owing to the advantages of low cost, light weight, and easy preparation on flexible substrates [8,9]. However, the performances of the PSCs with the device structure of Al/Ca/poly(3-hexylthiophene): [6,6]-phenyl-C 61 -butyric acid methyl ester (P3HT:PCBM)/poly(3,4-ethylene-dioxythiophene): poly(styrene sulfonate) (PEDOT:PSS)/indium tin oxide (ITO)/glass were restricted by their serious drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Performance improvement mechanisms of P3HT:PCBM inverted polymer solar cells using extra PCBM and extra P3HT interfacial layers

Huang

Lee

2015

Organic Electronics

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Section: Introductionmentioning

confidence: 99%

Performance improvement mechanisms of P3HT:PCBM inverted polymer solar cells using extra PCBM and extra P3HT interfacial layers

Huang

Lee

2015

Organic Electronics

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“…[1][2][3][4][5] Recientemente, las celdas solares orgánicas (OSC) han surgido como una nueva tecnología emergente para competir con las celdas solares tradicionales basadas en Silicio.…”

Section: Introductionunclassified

“…1 Siendo las celdas solares orgánicas (OSCs) libres de metales una potencial alternativa "verde" para la generación de energía eléctrica, ya que estas son comercialmente atractivas por su bajo costo de fabricación, semitransparentes, bajo peso, flexibilidad física, fácil integración, producción continua utilizando herramientas de impresión y su desempeño relativamente bueno en presencia de luz solar difusa, además este tipo de celdas son sostenibles y amigables con el ambiente. [1][2][3][4][5] Recientemente, las celdas solares orgánicas (OSC) han surgido como una nueva tecnología emergente para competir con las celdas solares tradicionales basadas en Silicio. 2,6,7 Para llevar esta tecnología a una gran escala y hacerla comercialmente viable es necesario alcanzar una eficiencia de conversión fotoeléctrica (PCE) superior al 10% y garantizar un tiempo de vida útil de 10 años (mayor estabilidad fotoquímica).…”

Section: Introductionunclassified

Theoretical Characterization and Design of Efficient Photoactive Materials Based on Naphthopyrrole and Naphthothiophene Derivatives Aimed Towards Organic Solar Cells

Cuadro¹,

Robles²

2016

Química Nova

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. In this research we have designed electron donors D-π-A type containing two different π fragments to obtain naphthopyrrole (D-NPR-A) and naphthotiophene (D-NTP-A) derivatives, proposed for the use in organic bulk hetero-junction (BHJ) solar cells (OSCs). These derivatives were characterized by DFT and TD-DFT calculations. For all the electron donors the anchorage fragment was 2-methylenemalononitrile, while the chromophore fragment was spanned between diphenylamine, triphenylamine, thiophene. Properties affecting open-circuit photovoltage (V OC ) and short-circuit photocurrent (J SC ) from D-π-A type derivatives, such as geometric structure, frontier-molecular orbital energies, exciton driving force energy, natural bond orbital analysis, absorption spectra and light harvesting efficiency. Energy from HOMO and LUMO orbitals was discussed. Theoretical calculations from TD-DFT within Coulumb attenuation method CAM-B3LYP were able to predict excited state properties. The electron donors D-π-A type exhibit photoelectric conversion efficiency above 10%, being the naphthopyrrole derivatives (D-NPR-A) along with the [6,6]-phenyl-C61-butyric acid methyl ester (PC 61 BM) the complexes with higher photoelectric properties, these complexes are proposed as photoactive materials in the construction of organic bulk hetero-junction solar cells.Keywords: organic solar cell; D-NPR-A derivatives; D-NTP-A derivatives; DFT methods; photoelectric conversion efficiency. INTRODUCCIÓNCon la creciente demanda mundial de energía combinada con el agotamiento de los recursos derivados del petróleo y los riesgos de calentamiento global se ilustra la necesidad urgente de una transición hacia fuentes alternativas de energía renovable.1 Siendo las celdas solares orgánicas (OSCs) libres de metales una potencial alternativa "verde" para la generación de energía eléctrica, ya que estas son comercialmente atractivas por su bajo costo de fabricación, semitransparentes, bajo peso, flexibilidad física, fácil integración, producción continua utilizando herramientas de impresión y su desempeño relativamente bueno en presencia de luz solar difusa, además este tipo de celdas son sostenibles y amigables con el ambiente. [1][2][3][4][5] Recientemente, las celdas solares orgánicas (OSC) han surgido como una nueva tecnología emergente para competir con las celdas solares tradicionales basadas en Silicio.2,6,7 Para llevar esta tecnología a una gran escala y hacerla comercialmente viable es necesario alcanzar una eficiencia de conversión fotoeléctrica (PCE) superior al 10% y garantizar un tiempo de vida útil de 10 años (mayor estabilidad fotoquímica). 8-11La capa fotoactiva de las OSCs se constituye por dos componentes, uno electrodonador (D) y otro electroaceptor (A), ensamblados generalmente en una estructura bi-capa (tipo wafer) o en forma de mezcla, conocida como heterounión de volumen (BHJ).1,12,13 Las OSCs del tipo BHJ han incrementado en un factor de 10 la PCE respecto a los dispositivos convencionales en forma de bi-capa. 2Diferentes estudios muestran...

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“…As a rule, electron transport layer (ETLs) included organic materials (such as poly[(9,9-bis(3'-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluore ne)] (PFN) 1 , poly(ethylene oxide)) and inorganic metal oxides materials (for instance, lithium fluoride (LiF) 10-12 , titanium oxide (TiO x ) 8,13,14 , zinc oxide (ZnO) 7,9,13,[15][16][17] ).…”

Section: Introductionmentioning

confidence: 99%

In Situ Formation of ZnO in Graphene: A Facile Way To Produce a Smooth and Highly Conductive Electron Transport Layer for Polymer Solar Cells

Wang

Chen

et al. 2015

ACS Appl. Mater. Interfaces

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A novel electron transport layer (ETL) based on zinc oxide@graphene:ethyl cellulose (ZnO@G:EC) nanocomposite is prepared by in situ formation of zinc oxide (ZnO) nanocrystals in a graphene matrix to improve the performance of polymer solar cells. Liquid ultrasound exfoliation by ethyl cellulose as stabilizer not only allows for uniform dispersion of graphene solution but also maintains an original structure of graphene gaining a high conductivity. The ZnO@G:EC ETL displays a quite smooth morphology and develops the energy-level alignment for the electron extraction and transportation. Subsequently, the device based on poly(3-hexylthiophene) (P3HT):(6,6)-phenyl-C61 butyric acid methyl ester (PC61BM) with the ZnO@G:EC as ETL obtains a power conversion efficiency (PCE) of 3.9%, exhibiting a ∼20% improvement compared to the familiar device with bare ZnO nanocrystals as ETL. Replacing the active layer with polythieno[3,4-b]thiophene/benzodithiophene (PTB7): (6,6)-phenyl-C71 butyric acid methyl ester (PC71BM), the PCE can be dramatically improved to 8.4%. This facile and fascinating method to produce a smooth and highly conductive electron transport layer provides an anticipated approach to obtain high performance polymer solar cells.

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Improved power conversion efficiency by insertion of RGO–TiO2 composite layer as optical spacer in polymer bulk heterojunction solar cells

Cited by 21 publications

References 82 publications

Performance improvement mechanisms of P3HT:PCBM inverted polymer solar cells using extra PCBM and extra P3HT interfacial layers

Performance improvement mechanisms of P3HT:PCBM inverted polymer solar cells using extra PCBM and extra P3HT interfacial layers

Theoretical Characterization and Design of Efficient Photoactive Materials Based on Naphthopyrrole and Naphthothiophene Derivatives Aimed Towards Organic Solar Cells

In Situ Formation of ZnO in Graphene: A Facile Way To Produce a Smooth and Highly Conductive Electron Transport Layer for Polymer Solar Cells

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