Enhanced Device Efficiency and Long-Term Stability via Boronic Acid-Based Self-Assembled Monolayer Modification of Indium Tin Oxide in a Planar Perovskite Solar Cell

Kara, Duygu Akin; Kara, Koray; Oylumluoglu, Gorkem; Yiğit, Mesude Zeliha; Can, Mustafa; Kim, Jae Joon; Burnett, Edmund K.; Arellano, David; Buyukcelebi, Sumeyra; Özel, Faruk; Usluer, Özlem; Briseño, Alejandro L.; Kuş, Mahmut

doi:10.1021/acsami.8b10445

Cited by 53 publications

(35 citation statements)

References 42 publications

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“…Interfacial modifications were carried out using a new series of fluorine‐functionalized boronic acid SAMs. 2F‐SAMs modification exhibits 16% efficiency and long‐term stability also provide a permanent ITO work function modification and prevents the degradation of ITO because of the acidic effect of PEDOT:PSS …”

Section: Structural Influence On the Stability Of Pscsmentioning

confidence: 99%

A Review of Perovskites Solar Cell Stability

Wang

Mujahid

Duan

et al. 2019

Adv Funct Materials

996

849

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the perovskite material onto transparent substrates covered with a compact TiO 2 layer and an optional mesoporous TiO 2 (or Al 2 O 3 ) scaffold layer. [34] The p-i-n structure, which involves depositing the perovskite material onto transparent substrates which are covered with an HTL, such as the poly(3,4-ethylene dioxythiophene):polystyrene sulfonic acid (PEDOT:PSS). [35] So far, PSCs based on both mesoporous and planar structure exhibit high performance and stability, however, the comparison of the advantages of two different strucutres in stability is still under debate. [36] Mesoporous Perovskite Solar CellsRecently, a new generation of photovoltaic converters, mesoporous solar cell [37] has attracted more consideration due to their low material cost, simple fabrication process, high energy conversion efficiencies, [38] like dye-sensitized solar cell, [38c] and mesoporous perovskite solar cell. [5a,21,39] PCE up to 9.7% has been achieved by using CH 3 NH 3 PbI 3 (MAPbI 3 ) perovskite nanocrystals as the light absorber to fabricate a solid-state MPSC. [21] After that the research focuses on solid-state MSCs began to transfer from DSSCs to MPSCs. [32a,40] In an MPSC, a compact layer is usually deposited on fluorine doped tin oxide (FTO) layer, which usually extracts electrons and block holes. Three strategies are broadly used for depositing the TiO 2 layer: 1) Spin-coating the colloidal dispersion of TiO 2 nanoparticles followed by a thermal treatment (titanium source: TiCl 4 , [41] titanium isopropoxide, [42] tetra-n-butyl-titanate; [43] 2) spin-coating titanium precursor solutions followed by a thermal treatment (titanium source: TiCl 4 , [44] titanium isopropoxide, [23] titanium diisopropoxide bis(acetylacetonate) 12 ); 3) spray pyrolysis deposition (titanium source: titanium diisopropoxide bis(acetylaceto nate) 18 ). [45] Low-temperature sintering approaches to prepare an

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Section: Structural Influence On the Stability Of Pscsmentioning

confidence: 99%

A Review of Perovskites Solar Cell Stability

Wang

Mujahid

Duan

et al. 2019

Adv Funct Materials

996

849

View full text Add to dashboard Cite

show abstract

“…[ 150–153 ] Application of SAMs to PSCs have proved to be an excellent technique for not only improving the device efficiency but device stability as well. [ 107,121,143,145 ]…”

Section: Sams For Improving Perovskite Solar Cells Stabilitymentioning

confidence: 99%

“…More importantly, SAMs were introduced as new hole‐selective contacts and achieved a remarkable stabilized efficiency of 21.1%. Kara and co‐workers also modified the WF ITO with SAMs [ 143 ] by using boronic acid‐based fluorine‐terminated SAMs on top of the ITO. After 30 days in ambient conditions, the photovoltaic efficiency of the cells reduced by only 20%.…”

Section: Sams For Improving Perovskite Solar Cells Stabilitymentioning

confidence: 99%

Applications of Self‐Assembled Monolayers for Perovskite Solar Cells Interface Engineering to Address Efficiency and Stability

Ali

Roldán‐Carmona

Sohail

et al. 2020

Advanced Energy Materials

168

137

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the majority of the market shares as compared to next-generation thin-film PV technologies. Nevertheless, technological challenges in improving efficiencies and decreasing the high-energy requirements connected to the fabrication of silicon PV results in a higher global warming potential. In an effort to achieve lower fabrication cost and higher efficiencies, different types of thin-film PV technologies have been developed including dyesensitized solar cells, [2,3] organic solar cells, [4,5] copper indium tin sulfur [6,7] and emerging organic-inorganic lead halide perovskite solar cells (PSCs). [8,9] The combined merits of low fabrication cost and high power conversion efficiency (PCE) are distinct features of PSCs where PCE has jumped from 3.8% [8] to 25.2% [10] in just a decade. Such a sharp increase in PCE is mainly attributed to the large absorption coefficient, [11] long carrier lifetime, [12] high trap resistance, [13] high dielectric constant, [14-16] low binding energy, [17] and tunable bandgap of 1.2−1.7 eV, [18] all combined in a single perovskite material. 1.1. Perovskite Solar Cell Device Structures A typical perovskite solar cell consists of a light-absorbing perovskite layer which is sandwiched between an electron transport layer (ETL) and a hole transport layers (HTL). To complete the device, ETL is supported on a transparent conducting oxide (TCO) front electrode, and HTL on metal-coated back contact electrode, Figure 1. There are two basic structures for the PSC: the so-called mesoporous structure, which contains a mesoporous ETL layer (i.e., mesoporous TiO 2), and the planar structure, as depicted in Figure 1a,b. Even though early reports based on mesoporous devices assumed that the perovskite infiltration through the mesoporous scaffold improved the charge carrier collection to the electrode, later investigations performed by Lee and co-workers replaced the TiO 2 with an insulating Al 2 O 3 mesoporous layer, and reported for the first time the ambipolar nature of the perovskite materials, allowing the realization of longer diffusion length. [19] This enabled the fabrication of planar devices, and gave rise to an impressive evolution of device architectures, novel materials and cell configurations either in n-i-p or p-in designs. [12,19,20] In addition, Due to a certified 25.2% high efficiency, low cost, and easy fabrication; perovskite solar cells (PSCs) are the focus of interest among the nextgeneration photovoltaic technologies. Long-term stability is one of the most challenging obstacles to bring technology from the lab to the market. In this review, applications of self-assembled monolayers (SAMs) to enhance the power conversion efficiency (PCE) and stability of PSCs is discussed. In the first part, the introduction of SAMs, and deposition techniques applied to different PSC architectures are described. In the middle section, current efforts to utilize SAMs to fine-tune the optoelectronic properties to enhance the PCE and stability are detailed. The improvements in surface morphology, energ...

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“…Comprehensive efforts have been devoted to the investigation of all-inorganic lead halide perovskites with interesting and exciting potential applications, such as solar cells (SCs), lasers, light-emitting diodes, and photodetectors, owing to their superior electronic and photoelectric properties. − However, the often used toxic heavy metals such as Pb still remain as the main block to hamper their future application. To date, it was reported that replacing Pb with homovalent nontoxic elements, such as Sb, Ba, Zn, Sn, Ge, Cu, and Mn, or heterovalent nontoxic elements in the form of double perovskite could effectively address the toxic issue. − Lead-free perovskites need more efforts to explore their application in the photovoltaic field.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Stability of Orthorhombic CsSnI₃ Perovskite via Oriented π-Conjugated Ligand Passivation

Zheng

Zhi

Shang

et al. 2020

ACS Appl. Mater. Interfaces

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Lead-free orthorhombic CsSnI 3 (Bγ-CsSnI 3 ) perovskite has been emerging as one of the potential candidates of photovoltaic materials with superior performance. However, the instability induced by rapid reconstructive phase transition and the oxidation of Sn 2+ greatly limits their future application. We thus reported a strategy, oriented π-conjugated ligand passivation, for enhancing the stability of Bγ-CsSnI 3 , simulated using a Bγ-CsSnI 3 slab model based on the first-principles computation. The phase stability was found to be strongly dependent on the orientations of phenylethylammonium (PEA + ) ligands. The passivated Bγ-CsSnI 3 slab with the ligand molecule axis along [414] was demonstrated as the most stable with the lowest adsorption energy (E ads ). Based on this configuration, the calculated formation energies (E form ) of halfand full-monolayer coverage were even more negative than that of yellow phase (Y-) CsSnI 3 passivated by PEA + ligands, verifying the enhanced phase stability. Furthermore, the surface states could be effectively suppressed and the downshifted conduction band minimum (CBM) resulted in a reduced band gap for the completely capped Bγ-CsSnI 3 . Moreover, the CBM and the valence band maximum (VBM) of the system with complete coverage were respectively donated by the surface and bulky components of the slab, which might benefit the separation and transfer of photogenerated carriers.

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Enhanced Device Efficiency and Long-Term Stability via Boronic Acid-Based Self-Assembled Monolayer Modification of Indium Tin Oxide in a Planar Perovskite Solar Cell

Cited by 53 publications

References 42 publications

A Review of Perovskites Solar Cell Stability

A Review of Perovskites Solar Cell Stability

Applications of Self‐Assembled Monolayers for Perovskite Solar Cells Interface Engineering to Address Efficiency and Stability

Enhancing the Stability of Orthorhombic CsSnI₃ Perovskite via Oriented π-Conjugated Ligand Passivation

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Enhanced Device Efficiency and Long-Term Stability via Boronic Acid-Based Self-Assembled Monolayer Modification of Indium Tin Oxide in a Planar Perovskite Solar Cell

Cited by 53 publications

References 42 publications

A Review of Perovskites Solar Cell Stability

A Review of Perovskites Solar Cell Stability

Applications of Self‐Assembled Monolayers for Perovskite Solar Cells Interface Engineering to Address Efficiency and Stability

Enhancing the Stability of Orthorhombic CsSnI3 Perovskite via Oriented π-Conjugated Ligand Passivation

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Enhancing the Stability of Orthorhombic CsSnI₃ Perovskite via Oriented π-Conjugated Ligand Passivation