A new carbazole-based hole-transporting material with low dopant content for perovskite solar cells

Wang, Jiang; Cao, Yu; Li, Fusheng; Zong, Xueping; Guo, Jiao; Sun, Zhe; Xue, Song

doi:10.1016/j.electacta.2016.05.203

Cited by 34 publications

(26 citation statements)

References 41 publications

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“…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%

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

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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.

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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

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“…In concretely, the π‐π* transition between the two naphthyl units is at 280 nm due to the comparable absorption at this position. The absorption peaks at 380 nm is assigned to the π‐π* transition in carbazole units according to references . The strong absorption of Q216 at 380 nm is originated from the strengthened electron density in carbazole units by the introduction of “2”‐BMPA.…”

Section: Resultsmentioning

confidence: 94%

New Efficient 1,1′‐Bi‐2‐naphthylamine‐Based Hole‐Transporting Materials for Perovskite Solar Cells

et al. 2017

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Two new efficient hole transporting materials (HTMs) Q216 and Q219 based on C2‐symmetric 1,1′‐bi‐2‐naphthylamine central core have been synthesized. The bis(4‐methoxyphenyl)amine‐substituted 9H‐carbazole were chose as end groups to link with the central core. The two HTMs have suitable molecular orbital energy levels, being well matched with that of CH3NH3PbI3 and carbon counter electrode. By introducing bis(4‐methoxyphenyl)amine unit (BMPA) to “3” position in carbazole donor, Q219 exhibits smaller dihedral angle between carbazole and naphthyl unit than Q216 with “2”‐BMPA, which may improve the electron donor ability of carbazole and favors to charge transport. The highest power conversion efficiency of PSC based‐Q219 is 9.31 %. EIS and IMVS measurements confirm that Q219 reduces charge recombination in perovskite solar cells (PSCs). Accordingly, the PSC with Q219 favors a 99 mV higher open circuit voltage than that of the Q216. The results provide some useful ideas to further design more promising structure of HTMs.

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“…[15][16][17][18] Liu et al reporteds piro[fluorene-9,9'-xanthene]-basedH TMs for PSCs, in which not only ah igh PCE but also improved stabilityw ere achieved. [23][24][25][26][27][28][29][30][31][32] In the molecular structures of many HTMs, ac arbazole moiety together with some atypical hole-transport groupsf orm the core of the molecule and a phenylamine structure are found on the outsideo ft he molecule core. However,t hese materials and Spiro-OMeTAD all contain fluoride groups, which are responsible for al arge proportion of the final cost of the ultimate product.…”

Section: Introductionmentioning

confidence: 99%

“…[19] Xu et al [20] and Bi et al [21] achieved high PCEs of over 19 % using similarly structured small-molecule materials (X59 and X60). [23,24,[26][27][28][29] These atypical hole-transportg roups( e.g., benzene and biphenyl) can transport both holes and electrons, which mayi mpair the hole mobility of theseHTMs. The replacement of fluorine with al ess expensive substitute seems to be an effective way to cut the cost of the HTMs.…”

Section: Introductionmentioning

confidence: 99%

Low‐Cost Carbazole‐Based Hole‐Transport Material for Highly Efficient Perovskite Solar Cells

Chen

Zheng

et al. 2017

ChemSusChem

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A low-cost carbazole-based small-molecule material, 1,3,6,8-tetra(N,N-p-dimethoxyphenylamino)-9-ethylcarbazole, was designed and synthesized through a facile three-step synthetic route. The material was characterized and applied as a hole-transport material (HTM) for low-temperature-processed planar perovskite solar cells (PSCs). Devices based on this new HTM exhibit a high power-conversion efficiency of 17.8 % that is comparable to that of PSCs based on the costly 2,2',7,7'-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene (Spiro-OMeTAD) (18.6 %) .

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A new carbazole-based hole-transporting material with low dopant content for perovskite solar cells

Cited by 34 publications

References 41 publications

Facilely Synthesized spiro[fluorene‐9,9′‐phenanthren‐10′‐one] in Donor–Acceptor–Donor 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

New Efficient 1,1′‐Bi‐2‐naphthylamine‐Based Hole‐Transporting Materials for Perovskite Solar Cells

Low‐Cost Carbazole‐Based Hole‐Transport Material for Highly Efficient Perovskite Solar Cells

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