Low Cost and Solution Processed Interfacial Layer Based on Poly(2-ethyl-2-oxazoline) Nanodots for Inverted Perovskite Solar Cells

Chen, Wei; Zhu, Yudong; Yu, Yi‐Zhe; Xu, Leiming; Zhang, Guining; He, Zhubing

doi:10.1021/acs.chemmater.6b00964

Cited by 46 publications

(31 citation statements)

References 37 publications

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“…The work function shift is expected to result in the improvement of the energy band alignment at perovskite interfaces with both PEDOT:PSS and PCBM (Figure f). This would in turn result in improved charge collection, and consequently improved device performance …”

Section: Resultsmentioning

confidence: 99%

Synergy Effect of Both 2,2,2‐Trifluoroethylamine Hydrochloride and SnF₂ for Highly Stable FASnI_3−xCl_x Perovskite Solar Cells

Yu¹,

Xu²,

Liao

et al. 2019

Solar RRL

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The environmentally friendly additive 2,2,2‐trifluoroethylamine hydrochloride (TFEACl) is used in synergy with SnF2 to enhance the efficiency and stability of FASnI3‐based solar cells. Both TFEA+ and Cl− are present in the films, but only Cl− is incorporated into the crystal lattice of the perovskite. The addition of TFEACl suppresses the segregation of SnF2, resulting in improvements in film morphology, in addition to a more favorable energy band alignment, and improved suppression of the formation of Sn4+. Consequently, reduced charge recombination and improved charge collection result in an efficiency enhancement from 3.63 to 5.30%. The stability of the devices is also significantly enhanced, with devices with TFEACl retaining over 60% of initial PCE after 350 h of light soaking in ambient, while devices without TFEACl experience failure in 120 h under the same testing condition.

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Section: Resultsmentioning

confidence: 99%

Synergy Effect of Both 2,2,2‐Trifluoroethylamine Hydrochloride and SnF₂ for Highly Stable FASnI_3−xCl_x Perovskite Solar Cells

Yu¹,

Xu²,

Liao

et al. 2019

Solar RRL

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“…However, the effect of device degradation during transportation to another building for the measurement cannot be excluded. This increase in J sc can be attributed to the enhanced electron transfer rate by the two kinds of CBLs . In addition to increased J sc , V oc was also enhanced from 0.99 V (w/o CBL) to 1.03 V (ZrAcac only) and 1.06 V (PEI only).…”

Section: Summary Of the Photovoltaic Performances Of The Inverted Plamentioning

confidence: 89%

“…Second, the band level offset at the silver electrode interface always affects the carrier transport and collection, especially for ultrathin silver electrodes . The chemical interaction at the interface also determines the adhesive strength between silver film and the underlayer, as well as electrode degradation by halide anions and ambient atmosphere . Last but not least, the transmission loss induced by the reflection of silver electrode film limits the tuning range of silver thickness due to the tradeoff between conductivity and optical transmittance.…”

Section: Summary Of the Photovoltaic Performances Of The Inverted Plamentioning

confidence: 99%

Supersmooth Ta₂O₅/Ag/Polyetherimide Film as the Rear Transparent Electrode for High Performance Semitransparent Perovskite Solar Cells

Ying

Chen

Lin

et al. 2018

Advanced Optical Materials

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Semitransparent solar cells have attractedincreasing attention because of their gen eral applications in smart windows for automobiles and buildings, tandem solar cells, electronic chargers, and so on. [1][2][3] Due to facile solution processing and high record efficiency of 23.3% in nontrans parent devices, [4][5][6][7][8] organic-inorganic lead halide perovskite solar cells (PSCs) are excellent candidates for semitransparent devices, since the efficiency of semi transparent devices is inevitably lower compared to devices with fully reflective electrodes. In a typical semitransparent PSC structure, the rear transparent elec trode (RTE) is one of the key components because it is deposited on the underlying soft active layer. So far, various trans parent conductive electrodes have been investigated as RTEs for semitransparent PSCs, such as transparent conductive oxides, [9] conductive polymers, [10] carbon nanotubes, [11] graphene, [12] metal nano wires, [13,14] metal mesh, [15] ultrathin metal films, [16] and so on. Among them, the ultrathin metal films with the thickness below 10 nm have the advantage in the facile deposition pro cess, as well as low sheet resistance, high optical transmittance, and good adhesive strength comparable to other alternatives.The ultrathin silver film exhibits great potential as a low cost, effective RTE material in semitransparent devices. [17][18][19][20] However, there are still some challenges for the application of ultrathin silver films in high performance semitransparent PSCs. First, the 3D growth mode of silver results in separate islands for film thickness below 10 nm, [21] which leads not only low conductivity due to disconnect between parts of the electrode, [22] but also optical loss due to surface plasmonic effect. [23] The smooth and crossconnecting surface morphology of ultrathin silver film is necessary to realize high performance semitransparent PSCs. Second, the band level offset at the silver electrode interface always affects the carrier transport and collection, [24] especially for ultrathin silver electrodes. [25] The chemical interaction at the interface also determines the adhesive strength between silver film and the underlayer, as well as electrode degradation by halide anions and ambientAlthough it exhibits great potential as the rear transparent electrode (RTE) material in semitransparent devices, the ultrathin silver film still faces some significant challenges, such as surface plasmonic effect induced optical loss, the conflict between conductivity and transmittance, and the band level mismatch at device interfaces. In this work, a novel combination of ZrAcac/PEI/Ag/Ta 2 O 5 is employed as the RTE of the semitransparent perovskite solar cells in the planar inverted device structure of "indium-tin-oxide (ITO)/NiO x /MAPbI 3 /PC 61 BM/ZrAcac/PEI/Ag/Ta 2 O 5 ." Interface engineering with ZrAcac/PEI enables a significant increase in the device efficiency for 100 nm thick Ag electrode, from 17.48% to 18.84%. Ultrathin 9 nm Ag film coated on polyetherimide (PE...

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“…Although a metallic anode with a low work function such as Al (≈4.19 eV) or Ca (≈2.71 eV) is more appropriate in terms of aforementioned energy band alignment, [53] metals with low work functions tend to be vulnerable to moisture and oxygen in air; thus, both Ag and Au are widely used, with the occasional incorporation of buffer layers. [56,57] …”

Section: Perovskite Solar Cells (Pscs)mentioning

confidence: 99%

Metal‐Nanowire‐Electrode‐Based Perovskite Solar Cells: Challenging Issues and New Opportunities

Ahn

Hwang

Jeong

et al. 2017

Advanced Energy Materials

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in PSCs has been accomplished within a relatively short period of time, owing to OMHP's merits for low-cost, large-area, flexible photovoltaic applications; these merits include (i) the precursor chemicals, including organic ammonium halides and lead (tin) halides, for synthesizing the OMHP materials are cost-effective, and the OMHP layers can be readily prepared by simple wet-chemical approaches such as a spin coating or a slot-die coating process; (ii) the processing temperatures are relatively low, below 150 °C, for the formation of well-crystalized OMHP layers, in contrast to other thin-film-based solar cells; (iii) both the high absorption coefficients [6] and high carrier mobilities [7] suggest promising possibilities for highperformance photoactive materials. The PCE certified by National Renewable Energy Laboratory (NREL) reached 22.1% in 2016, [8] which is either comparable to or outperforms the PCEs of other next-generation thin-film solar cells, including CIGS(Se) (22.3%), CZTS/Se (12.6%), CdTe (22.1%), and organic photovoltaics (OPVs, 11.5%).Apart from the race to achieve higher PCE, other important research has been directed toward the development of lead-free OMHP layers, [9] large-area device fabrication, [10,11] a methodology of achieving long-term stability against moisture and irradiation, [12,13] and a way of recycling constituent cell materials. [14] Another fascinating research topic concerns the electrodes for PSCs. To date, vacuum-deposited transparent conductive oxides (TCOs), such as indium tin oxide (ITO) and fluorinated tin oxide (FTO), have been used widely as a large-area window electrode through which light passes. However, TCOs have received criticism in terms of their fabrication cost, brittleness, and the scarcity of raw materials (especially, the indium in ITO). [15] Opaque noble metal electrodes (Au, Ag), which are usually used as a back contact, are also fabricated with a costly vacuum-assisted deposition process. From the viewpoint of cost-effectiveness, both transparent and opaque conventional electrodes apparently represent predominant impediments to the high-throughput fabrication of PSCs, giving rise to a significant demand to replace these conventional electrodes with alternatives.To date, a variety of alternative electrodes have been reported in the literature.

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Low Cost and Solution Processed Interfacial Layer Based on Poly(2-ethyl-2-oxazoline) Nanodots for Inverted Perovskite Solar Cells

Cited by 46 publications

References 37 publications

Synergy Effect of Both 2,2,2‐Trifluoroethylamine Hydrochloride and SnF₂ for Highly Stable FASnI_3−xCl_x Perovskite Solar Cells

Synergy Effect of Both 2,2,2‐Trifluoroethylamine Hydrochloride and SnF₂ for Highly Stable FASnI_3−xCl_x Perovskite Solar Cells

Supersmooth Ta₂O₅/Ag/Polyetherimide Film as the Rear Transparent Electrode for High Performance Semitransparent Perovskite Solar Cells

Metal‐Nanowire‐Electrode‐Based Perovskite Solar Cells: Challenging Issues and New Opportunities

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Low Cost and Solution Processed Interfacial Layer Based on Poly(2-ethyl-2-oxazoline) Nanodots for Inverted Perovskite Solar Cells

Cited by 46 publications

References 37 publications

Synergy Effect of Both 2,2,2‐Trifluoroethylamine Hydrochloride and SnF2 for Highly Stable FASnI3−xClx Perovskite Solar Cells

Synergy Effect of Both 2,2,2‐Trifluoroethylamine Hydrochloride and SnF2 for Highly Stable FASnI3−xClx Perovskite Solar Cells

Supersmooth Ta2O5/Ag/Polyetherimide Film as the Rear Transparent Electrode for High Performance Semitransparent Perovskite Solar Cells

Metal‐Nanowire‐Electrode‐Based Perovskite Solar Cells: Challenging Issues and New Opportunities

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Synergy Effect of Both 2,2,2‐Trifluoroethylamine Hydrochloride and SnF₂ for Highly Stable FASnI_3−xCl_x Perovskite Solar Cells

Synergy Effect of Both 2,2,2‐Trifluoroethylamine Hydrochloride and SnF₂ for Highly Stable FASnI_3−xCl_x Perovskite Solar Cells

Supersmooth Ta₂O₅/Ag/Polyetherimide Film as the Rear Transparent Electrode for High Performance Semitransparent Perovskite Solar Cells