Enhancing the Internal Quantum Efficiency and Stability of Organic Solar Cells via Metallic Nanofunnels

Baek, Se‐Woong; Kang, Juhoon; Lee, Hyunsoo; Park, Jeong Young; Lee, Jung‐Yong

doi:10.1002/aenm.201501393

Cited by 33 publications

(25 citation statements)

References 36 publications

(60 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…With [6,6]‐phenyl C 71 ‐butyric acid methyl ester (PC 71 BM) as the acceptor, PTB7:PC 71 BM active layers afforded record power conversion efficiencies (PCEs) higher than 8% in 2011 and soon later higher than 9% among single‐junction BHJ PSCs . Because of high efficiency, the PTB7:PC 71 BM active layer has been widely utilized in electrode modification investigations of BHJ PSCs with various interlayer materials . However, such high PCEs of the PTB7:PC 71 BM active layer were typically achieved with thin active layers of ≈100 nm.…”

Section: Photovoltaic Performances Of Ptb7:pc71bm Active Layers Procementioning

confidence: 99%

Using o‐Chlorobenzaldehyde as a Fast Removable Solvent Additive during Spin‐Coating PTB7‐Based Active Layers: High Efficiency Thick‐Film Polymer Solar Cells

Chen

Zhang

Jiang

et al. 2016

Advanced Energy Materials

View full text Add to dashboard Cite

active layer thickness range from 100 to 400 nm. [18] For large area and high speed roll-to-roll printing, e.g., with 1−2 m width and at 1−3 m s −1 , an ideal active layer should not only display an outstanding PCE at an optimal thickness, but also maintain enough high PCEs when a big thickness variation would occur, so as to supply a necessary thickness window for yield control of PSC products. [19][20][21][22] Small efficiency variations for different film thicknesses, such as PCEs between 5.3% and 6.9% for 84−370 nm range, [19] 6.5%−7.6% for 100−440 nm, [21] and 6.8%−8.3% for 80−400 nm range, [22] have been reported for several photovoltaic materials. Very recently, much higher PCEs between 10.2% and 10.8% were reported for relatively narrow thickness range from 300 to 400 nm. [23] Based on the solution printing criteria, the PTB7:PC 71 BM active layer would be far away from a suitable candidate, according to the present performances.Currently, thermal annealing, [24] solvent vapor annealing (SVA), [22,25] and solvent additive [26] are the typical methods for morphology optimizations of active layers. Since the discovery of great potential of alkanedithiols as solvent additives to improve the morphology and to elevate PCE of BHJ PSCs, [27] effective morphology controls with some new solvent additives such as alkanedihalides (e.g., 1,8-diiodooctane (DIO) in Figure 1), [28] 1-substituted naphthalenes, [29][30][31] benzene derivatives, [32][33][34][35] 3-substituted thiophenes, [36] oligo-ethylene glycols, [37] N-susbstituted-2-pyrrolidones, [37] and polydimethylsiloxane [38] have been demonstrated for active layers based on various donor materials.So far, DIO has become the most widely selected solvent additive for the morphology optimization. [39] It should be noted that, in the past years, several champion efficiencies of BHJ PSCs were achieved when active layers were solutionprocessed with DIO as the solvent additive. [9,10,40] Generally, DIO is a good solvent for fullerene acceptors and a non-solvent for most polymer donors, based on Hansen solubility parameters. [41] DIO possesses a boiling point (bp.) of 332.5 °C, much higher than 132.2 and 180.5 °C for chlorobenzene (CB) and o-dichlorobenzene, respectively, two common host solvents for solution processing of many active layers (Figure 1). During spin-coating of a blend solution containing the DIO additive, removing of a host solvent is very quick, and the donor phase establishes earlier than the acceptor phase because DIO still remains in the neighbor of fullerene domains. In an additional process to remove DIO, such as vacuum drying or inert solvent washing, [42,43] the acceptor phase established finally, from which donor and acceptor phases with good nanoscale phase Adv. Energy

show abstract

Section: Photovoltaic Performances Of Ptb7:pc71bm Active Layers Procementioning

confidence: 99%

Using o‐Chlorobenzaldehyde as a Fast Removable Solvent Additive during Spin‐Coating PTB7‐Based Active Layers: High Efficiency Thick‐Film Polymer Solar Cells

Chen

Zhang

Jiang

et al. 2016

Advanced Energy Materials

View full text Add to dashboard Cite

show abstract

“…A more enhanced certified PCE of 9.94% in PTB7‐Th:PC 70 BM OSCs was reported by He et al by controlling the blend ratio of PTB7‐Th and PC 70 BM . Very recently, several researchers also reported high PCEs over 10% by modifying the device structure …”

Section: Device Efficiencymentioning

confidence: 72%

“…Among the PBDTTT derivatives, the representative materials were poly[4,8‐bis[(2‐ethylhexyl)oxy]benzo[1,2‐b:4,5‐b′]dithiophene‐2,6‐diyl][3‐fluoro‐2‐[(2‐ethyl hexyl)carbonyl]thieno[3,4‐b]thiophenediyl]] (PTB7) and poly[[2,6′‐4,8‐di(5‐ethylhexylthienyl)benzo[1,2‐b;3,3‐b]dithiophene][3‐fluoro‐2[(2‐ethylhexyl)carbonyl]thieno[3,4‐b]thiophenediyl]] (PTB7‐Th) (Figure a) . Liang et al reported a high PCE of 7.4% in PTB7:PC 70 BM OSCs .…”

Section: Device Efficiencymentioning

confidence: 99%

Bulk‐Heterojunction Organic Solar Cells: Five Core Technologies for Their Commercialization

et al. 2016

View full text Add to dashboard Cite

The past two decades of vigorous interdisciplinary approaches has seen tremendous breakthroughs in both scientific and technological developments of bulk-heterojunction organic solar cells (OSCs) based on nanocomposites of π-conjugated organic semiconductors. Because of their unique functionalities, the OSC field is expected to enable innovative photovoltaic applications that can be difficult to achieve using traditional inorganic solar cells: OSCs are printable, portable, wearable, disposable, biocompatible, and attachable to curved surfaces. The ultimate objective of this field is to develop cost-effective, stable, and high-performance photovoltaic modules fabricated on large-area flexible plastic substrates via high-volume/throughput roll-to-roll printing processing and thus achieve the practical implementation of OSCs. Recently, intensive research efforts into the development of organic materials, processing techniques, interface engineering, and device architectures have led to a remarkable improvement in power conversion efficiencies, exceeding 11%, which has finally brought OSCs close to commercialization. Current research interests are expanding from academic to industrial viewpoints to improve device stability and compatibility with large-scale printing processes, which must be addressed to realize viable applications. Here, both academic and industrial issues are reviewed by highlighting historically monumental research results and recent state-of-the-art progress in OSCs. Moreover, perspectives on five core technologies that affect the realization of the practical use of OSCs are presented, including device efficiency, device stability, flexible and transparent electrodes, module designs, and printing techniques.

show abstract

“…when embedded in a material, MNPs trigger the redistribution of the electromagnetic field by coupling with the incident light at the localized surface plasmon resonance (LSPR) frequency; the light absorption of the surrounding material can be improved via both the increase in the optical‐path length caused by the plasmonic scattering and the near‐field enhancement (NFE)‐induced excitation effects . specifically, MNPs directly attached to a conductive substrate such as the indium tin oxide (ITO) electrode can provide a shorter road of charge flow and facilitate the charge extraction by the nanofunneling effect . moreover, the electromagnetic field around MNPs can also assist to increase the driving force for charge transport .…”

Section: Comparison Of Responsivities and Working Voltages In Perovskmentioning

confidence: 99%

“…The decrease in luminescent lifetime for the hybrid film also demonstrates the effective electron transfer process between perovskites and AuNRs as confirmed by time‐resolved PL measurements (Figure f). Notably, when MNPs are directly attached to the ITO electrode and contacted with the photoactive layer, the generated carriers in the photoactive layer can be funneled and extracted to the ITO electrode through the MNPs under illumination, hence increasing the carrier collection efficiency . This nanofunneling effect enhances charge extraction in structures such as the ITO/AuNRs/perovskites within the hybrid photodetectors.…”

Section: Comparison Of Responsivities and Working Voltages In Perovskmentioning

confidence: 99%

Perovskite–Gold Nanorod Hybrid Photodetector with High Responsivity and Low Driving Voltage

Wang

Lim

Quan

et al. 2018

Advanced Optical Materials

View full text Add to dashboard Cite

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adom.201701397. Perovskite-Based PhotodetectorsPhotoelectric conversion using photodetectors has been the subject of increasing interest in both academic and indus trial communities. Photodetectors can be used in a range of applications including image sensing, communication, environmental monitoring, and chemical/biological detec tion. [1][2][3] Solutionprocessable optoelectronic materials such as organic conjugated polymers, nanomaterials, and nanocom posites show promise as active layers for largearea, lowcost photodetectors.

show abstract

Enhancing the Internal Quantum Efficiency and Stability of Organic Solar Cells via Metallic Nanofunnels

Cited by 33 publications

References 36 publications

Using o‐Chlorobenzaldehyde as a Fast Removable Solvent Additive during Spin‐Coating PTB7‐Based Active Layers: High Efficiency Thick‐Film Polymer Solar Cells

Using o‐Chlorobenzaldehyde as a Fast Removable Solvent Additive during Spin‐Coating PTB7‐Based Active Layers: High Efficiency Thick‐Film Polymer Solar Cells

Bulk‐Heterojunction Organic Solar Cells: Five Core Technologies for Their Commercialization

Perovskite–Gold Nanorod Hybrid Photodetector with High Responsivity and Low Driving Voltage

Contact Info

Product

Resources

About