A multifunctional poly-N-vinylcarbazole interlayer in perovskite solar cells for high stability and efficiency: a test with new triazatruxene-based hole transporting materials

Huang, Li‐Bo; Liu, Jun‐Min; Chen, Yifan; Xiao, Limin; Kuang, Dai‐Bin; Mayor, Marcel; Su, Cheng‐Yong

doi:10.1039/c6ta09314k

Cited by 84 publications

(54 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This was due to the deeper HOMO level and higher hole mobility of 2,7‐Cbz‐EDOT. In a study by Su et al, hydrophobic and conductive polymer poly‐N‐vinylcarbazole (PVK) ( 29 ) has recently used as dual‐functional interlayer between perovskite and HTM of PSCs, to shield perovskite from moisture, suppress charge combination, and promote hole transport simultaneously (Figure ) . With triazatruxene‐based HTMs and PVK as the interlayer, PSCs with remarkable PCEs exceeding 18% have been achieved.…”

Section: Dopant‐free Hole Transporting Materials For Pscsmentioning

confidence: 99%

Dopant‐Free Hole Transporting Materials for Perovskite Solar Cells

Rezaee

Liu

et al. 2018

Solar RRL

View full text Add to dashboard Cite

This article reviews various dopant-free hole transporting materials (HTMs) used in perovskite solar cells (PSCs) in three main categories including inorganic, polymeric, and small molecule HTMs. PSCs have undergone rapid progress, achieving power conversion efficiencies (PCEs) above 22%. With their low production cost and high efficiencies, PSCs are considered promising next-generation solar cell technology. In all developed architectures for PSCs, including planar and mesoscopic with conventional and inverted structures, HTMs play a significant role in determining the photovoltaic performance of PSCs. Using p-type dopants, however, is considered a common strategy to increase the hole conductivity of HTM, which is usually compensated by a more complicated fabrication procedure, higher production costs, and lower stability of PSC. Although several reviews on HTMs have been published, progress on dopant free HTMs needs to be reviewed and analyzed. Here, a review covering most of the published reports on dopantfree HTMs is presented, and the device structure and fabrication method, HTM layer deposition techniques, and the efficiency and the stability of PSCs are addressed during discussions in each main category. Finally, an outlook on stability and PCE growth in PSCs based on dopant-free HTMs is presented.

show abstract

Section: Dopant‐free Hole Transporting Materials For Pscsmentioning

confidence: 99%

Dopant‐Free Hole Transporting Materials for Perovskite Solar Cells

Rezaee

Liu

et al. 2018

Solar RRL

View full text Add to dashboard Cite

show abstract

“…Recently,o rganic-inorganic halide perovskite solar cells (PSCs) have attracted considerable attention because of their outstanding performance in converting sunlight to electricity at al ow cost compared with silicon-based photovoltaict echnology.T he first PSCs, as ana-lyzed by Miyasaka in 2009, had power conversion efficiency (PCE) of 3.8 %. [12][13][14] To overcome these issues, numerouss tudies have focusedo nl ow-costp roduction without as piro-based linkage in the HTM, mainly using acene, [15] carbazole, [16][17][18][19][20][21][22][23] indole, [24][25][26] phenothiazine, [27] phenoxazine, [28] thiophene, [29][30][31][32][33][34][35] triarylamine, [36][37][38][39] triazateuxene, [40][41][42][43] and truxene. [11] In the conventional devicec onfiguration, 2,2',7,7'-tetrakis[N,N-di(4methoxyphenyl)amino]-9,9'-spirobifluorene( Spiro-OMeTAD) is generally used as the hole-transporting material( HTM) and has demonstrated PCEs of 20-21 %i nP SCs.…”

Section: Introductionmentioning

confidence: 99%

“…The spiro-based structure of this HTM also ensures superiors tability,h igher T g ,a nd favorable film morphology.H owever,S piro-OMeTAD is very expensive ( % 261 $g À1 ); synthesis of the material requires af ive-step procedure with at otal yield of less than 30 %. [12][13][14] To overcome these issues, numerouss tudies have focusedo nl ow-costp roduction without as piro-based linkage in the HTM, mainly using acene, [15] carbazole, [16][17][18][19][20][21][22][23] indole, [24][25][26] phenothiazine, [27] phenoxazine, [28] thiophene, [29][30][31][32][33][34][35] triarylamine, [36][37][38][39] triazateuxene, [40][41][42][43] and truxene. [44,45] Considerable efforts have also been devoted to investigating suitable HTMs by replacing the spiro-based core with novel spiro-based HTMs like spiro-acridine-fluorene, [46,47] spiro-bi[thieno [3,4-b] [1,4]dioxepine], [48] dispiro-oxepine, [49] spiro[fluorene-9,9'-xanthene], [6,[50][51]<...>…”

Section: Introductionmentioning

confidence: 99%

Facilely Synthesized spiro[fluorene‐9,9′‐phenanthren‐10′‐one] in Donor–Acceptor–Donor Hole‐Transporting Materials for Perovskite Solar Cells

Chen

Huang

et al. 2018

ChemSusChem

View full text Add to dashboard Cite

We have demonstrated two novel donor-acceptor-donor (D-A-D) hole-transport material (HTM) with spiro[fluorene-9,9'-phenanthren-10'-one] as the core structure, which can be synthesized through a low-cost process in high yield. Compared to the incorporation of the conventional HTM of commonly used 2,2',7,7'-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene (Spiro-OMeTAD), the synthesis process is greatly simplified for the presented D-A-D materials, including a minimum number of purification processes. This results in an increased production yield (>55 %) and suppressed production cost (<30 $ g ), in addition to high power conversion efficiency (PCE) in perovskite solar cells (PSCs). The PCE of a PSC using our D-A-D HTM reaches 16.06 %, similar to that of Spiro-OMeTAD (16.08 %), which is attributed to comparable hole mobility and charge-transfer efficiency. D-A-D HTMs also provide better moisture resistivity to prolong the lifetime of PSCs under ambient conditions relative to their Spiro-OMeTAD counterparts. The proposed new type of D-A-D HTM has shown promising performance as an alternative HTM for PSCs and can be synthesized with high production throughput.

show abstract

“…[68] A1 0nm-thick PVK interlayer was formed between the perovskite and HTL, where the effects of concentration on PVK film thickness, morphology,a nd photovoltaic performance were investigated and ac oncentration of 8mgmL À1 led to as ubstantial improvement of J sc , V oc ,a nd FF. [69] The basis for such improvement was attributed to more efficient charge separation after introduction of the PVK interlayer.T he HOMO level of the perovskite/PVK (À5.55 eV) was lower than the valence-band maximum (VBM) of perovskite (À5.43 eV), which is unfavorable for hole injection from the perovskite to HTL. Nevertheless, J sc and V oc were improved, indicatingt hat the change in HOMO of at hin PVK interlayer did not disturbc harget ransfer but played an important role in preventing recombination.…”

Section: Organic Molecules or Polymersmentioning

confidence: 99%

Impact of Interfacial Layers in Perovskite Solar Cells

2017

View full text Add to dashboard Cite

Perovskite solar cells (PCSs) are composed of organic–inorganic lead halide perovskite as the light harvester. Since the first report on a long‐term‐durable, 9.7 % efficient, solid‐state perovskite solar cell, organic–inorganic halide perovskites have received considerable attention because of their excellent optoelectronic properties. As a result, a power conversion efficiency (PCE) exceeding 22 % was certified. Controlling the grain size, grain boundary, morphology, and defects of the perovskite layer is important for achieving high efficiency. In addition, interfacial engineering is equally or more important to further improve the PCE through better charge collection and a reduction in charge recombination. In this Review, the type of interfacial layers and their impact on photovoltaic performance are investigated for both the normal and the inverted cell architectures. Four different interfaces of fluorine‐doped tin oxide (FTO)/electron‐transport layer (ETL), ETL/perovskite, perovskite/hole‐transport layer (HTL), and HTL/metal are classified, and their roles are investigated. The effects of interfacial engineering with organic or inorganic materials on photovoltaic performance are described in detail. Grain‐boundary engineering is also included because it is related to interfacial engineering and the grain boundary in the perovskite layer plays an important role in charge conduction, recombination, and chargecarrier life time.

show abstract

A multifunctional poly-N-vinylcarbazole interlayer in perovskite solar cells for high stability and efficiency: a test with new triazatruxene-based hole transporting materials

Abstract: Coupling of a polymer-protection method with the molecular design of a novel HTM in PSCs: a PVK-protection approach and triazatruxene-based HTMs are developed.

Cited by 84 publications

References 46 publications

Dopant‐Free Hole Transporting Materials for Perovskite Solar Cells

Dopant‐Free Hole Transporting Materials for Perovskite Solar Cells

Facilely Synthesized spiro[fluorene‐9,9′‐phenanthren‐10′‐one] in Donor–Acceptor–Donor Hole‐Transporting Materials for Perovskite Solar Cells

Impact of Interfacial Layers in Perovskite Solar Cells

Contact Info

Product

Resources

About