MAPbI3/agarose photoactive composite for highly stable unencapsulated perovskite solar cells in humid environment

Yang, Ying; Tian, Chen; Pan, Dequn; Gao, Jing; Zhu, Congtan; Lin, Feiyu; Zhou, Conghua; Tai, Qidong; Xiao, Si; Yuan, Yongbo; Dai, Qilin; Xie, Haipeng; Guo, Xueyi

doi:10.1016/j.nanoen.2019.104246

Cited by 43 publications

(26 citation statements)

References 47 publications

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“…[ 42 ] Based on the C 1s XPS spectra, as shown in Figure 5d, MA + cation in the perovskite led to the existence of CH and CN bonds whereas the CC bond may be surface contamination. [ 43,44 ] CH and CN bonds existed in the C 1s XPS spectra of all three perovskite films, indicating that these two additives had no obvious influence on the crystal structure of MAPbI 3 perovskite, agreeing well with the X‐ray diffraction (XRD) results shown in Figure S6 (Supporting Information). As compared with the pristine MAPbI 3 , CO bond was also found in the C 1s XPS spectra of MAPbI 3 ‐BP and MAPbI 3 ‐BA whereas only MAPbI 3 ‐BA showed a CC bond, which originated from the additives themselves.…”

Section: Resultssupporting

confidence: 81%

Improving Moisture/Thermal Stability and Efficiency of CH₃NH₃PbI₃‐Based Perovskite Solar Cells via Gentle Butyl Acrylate Additive Strategy

et al. 2020

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Organic–inorganic halide perovskite solar cells (PSCs) are a new class of photovoltaic devices, which have attracted increasing interests due to high efficiency, low cost, and simple fabrication process. Although a remarkable enhancement in power conversion efficiency (PCE) has been achieved in the last decade, the stability issue, including high water/heat sensitivity and UV light‐induced degradation, has become one of the main obstacles for practical applications of PSCs. Herein, hydrophobic butyl acrylate with CO and CC groups is reported as a new additive to enhance the PCE and moisture/thermal stability of CH3NH3PbI3‐based PSCs, which improves the quality of the perovskite film by promoting defect passivation, constructing a suitable energy‐level alignment, and increasing the charge carrier lifetime in PSCs. Such an additive is easily introduced into PSCs without the need for thermal treatment, which is typically required by other additives, causing a negative effect on the efficiency. The CH3NH3PbI3‐based PSC with butyl acrylate additive shows a superior PCE of 20.0%, 19% higher than that of the unmodified device (16.8%), as well as much improved moisture/thermal stability. Herein, a facile way is provided to enhance the PCE and stability of CH3NH3PbI3‐based PSCs simultaneously, which facilitates the commercialization of PSCs.

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Section: Resultssupporting

confidence: 81%

Improving Moisture/Thermal Stability and Efficiency of CH₃NH₃PbI₃‐Based Perovskite Solar Cells via Gentle Butyl Acrylate Additive Strategy

et al. 2020

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“…The production of PbI 2 peak in XRD spectra of perovskite films with and without [BZTAm]Cl modification can be assigned to the decomposition of black CH 3 NH 3 PbI 3 perovskite phase to yellowish PbI 2 , because the organic cation CH 3 NH 3 I + is extremely sensitive to the moisture. [ 25 ] Since the PbI 2 peak intensity for treated perovskite film is lower than to its counterpart, suggesting efficient moisture resistive capability of modifier [BZTAm]Cl. As a result, the optimized concentrated [BZTAm]Cl‐modified MAPbI 3 film shows much better ambient environment stability than the control film.…”

Section: Resultsmentioning

confidence: 99%

“…Two peaks at binding energies 138.1 and 143 eV can be assigned to the Pb4f 7/2 and Pb4f 5/2 orbitals of Pb ions, respectively. [ 25 ] However, two additional peaks can be observed at 136.8 and 141.4 eV for the perovskite film without [BZTAm]Cl treatment. These small peaks related to the presence of metallic Pb on the surface of perovskite film, which may be originated due to the existence of cations or iodine vacancies, acted as nonradiative recombination centers.…”

Section: Resultsmentioning

confidence: 99%

“…Currently, there are lots of approaches to improve the performance and stability of PSCs, containing additive engineering, using additive into a perovskite absorber layer and interface engineering, modifying the hole transport layer (HTL)/perovskite or perovskite/electron transport layer (ETL) interfaces. [ 23–26 ] The treatment of perovskite film by various modifying agents has been proved to be an effective strategy to passivate the interface defects and remarkably enhance the surface quality and ambient environment stability of the perovskite layer. For example, nonstoichiometric ratio of PbI 2 in the perovskite film presented at the grain boundaries or on the surface can decrease charge recombination by the creation of I‐type band alignment.…”

Section: Introductionmentioning

confidence: 99%

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Examining the Interfacial Defect Passivation with Chlorinated Organic Salt for Highly Efficient and Stable Perovskite Solar Cells

et al. 2020

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In perovskite solar cells (PSCs), the interfaces between perovskite film and charge transport layers have an enormous influence on the device performance and stability. Recently, it has been proven that the surface defect passivation of perovskite layer is an effective strategy to improve the device efficiency. Herein, an organic ammonium salt benzyltriethylammonium chloride ([BZTAm]Cl) is used as an ultra‐thin modification layer in perovskite films in MAPbI3 PSCs for passivating the surface defects. The obtained results demonstrate that the [BZTAm]Cl modifier improves the crystallization/morphology of perovskite film and effectively aligns the energy levels with the corresponding charge‐transporting layers, suppressing the nonradiative recombination and reducing the trap state density. As a result, a champion device efficiency of 20.45% is achieved for optimized concentration of [BZTAm]Cl in comparison with 17.87% for the control device. Moreover, the unencapsulated device presents a good long‐term stability after aging in an ambient environment with 40–50% relative humidity conditions for 30 days.

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“…Also, CH 2 I 2 can control the growth of the grains and improve the solvent-precursor interaction, leading to a pinhole-free and fully covered perovskite film. Yang et al [184] reported that a 5% addition of polysaccharide agarose can negate the effects of moisture-induced degradation of the perovskite film during synthesis. The formation of agarose-LiTFSI complexes decreased the hygroscopicity of LiTFSI, thus reducing water uptake and leading to less corrosion of the perovskite.…”

Section: Additive Engineering: One-step Spin-coatingmentioning

confidence: 99%

Ambient Fabrication of Organic–Inorganic Hybrid Perovskite Solar Cells

et al. 2020

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Unlike fossil fuels, the sun is an inexhaustible energy source that delivers more energy to the earth in 1 h than the entire planet consumes in one year. Energy can be harvested from the sun using photovoltaics (PV) and stored (e.g., batteries), meaning solar energy can be used as and when required. [3,4] Currently, the commercial PV market is dominated by single-junction crystalline silicon (c-Si) PV which deliver power conversion efficiencies (PCE) of over 26% under 1 Sun illumination (AM 1.5 standard). [5,6] Despite their high efficiencies, the fabrication of c-Si PV is nontrivial and lacks electronic tunability. Furthermore, the record efficiency for c-Si PV is 26.7% [5] which is very close to the theoretical limit of 29.4%. [7] This clearly indicates that c-Si PV is a mature technology and there is limited room for improvement. [8] Over the past two decades, third-generation solar cells such as dye-sensitized solar cells, [9,10] quantum dot solar cells, [11,12] organic solar cells, [13,14] and perovskite solar cells (PSCs) [15,16] have been developed as alternatives to c-Si technologies. Of these third-generation solar cells, single-junction PSCs have generated significant attention due to their intense visible to near-infrared absorptivity, [16-18] long diffusion lengths of the charge carriers, [19,20] high efficiency, [21,22] electronic and physical tunability, [23,24] and low manufacturing costs. [25,26] After the first report by Miyasaka's group in 2009, [27] the PCE for single junction devices increased considerably from 3.8% to 25.2%, [27,28] making it the fastest advancing PV technology to date. This has uniquely placed PSCs as the frontrunner technology to potentially replace or coexist with c-Si PV. The term "perovskite" refers to a group of compounds that share the same lattice structure as calcium titanium oxide (CaTiO 3). All PV perovskite materials have the general chemical formula ABX 3 , as illustrated in Figure 1a. Organic-Inorganic hybrid PSCs are typically made using an organic/ inorganic cation (A = methylammonium (MA) CH 3 NH 3 + , formamidinium (FA) CH 3 (NH 2) 2 + , or cesium), a divalent cation (B = Pb 2+ or Sn 2+) , [29] and an anion (X = Cl − , Br − , or I −), illustrated in Figure 1b. [16,30] A is surrounded by eight lead halide octahedra (B in the center of octahedra) and forms a cubic perovskite structure. When the size of A or/and X is changed, the structure of perovskite will distort. The Goldschmidt tolerance factor (t) [31] of perovskite is an empirical index for Organic-inorganic hybrid perovskite solar cells (PSCs) have attracted significant attention in recent years due to their high-power conversion efficiency, simple fabrication, and low material cost. However, due to their high sensitivity to moisture and oxygen, high efficiency PSCs are mainly constructed in an inert environment. This has led to significant concerns associated with the long-term stability and manufacturing costs, which are some of the major limitations for the commercialization of this cutting-edge tech...

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MAPbI3/agarose photoactive composite for highly stable unencapsulated perovskite solar cells in humid environment

Cited by 43 publications

References 47 publications

Improving Moisture/Thermal Stability and Efficiency of CH₃NH₃PbI₃‐Based Perovskite Solar Cells via Gentle Butyl Acrylate Additive Strategy

Improving Moisture/Thermal Stability and Efficiency of CH₃NH₃PbI₃‐Based Perovskite Solar Cells via Gentle Butyl Acrylate Additive Strategy

Examining the Interfacial Defect Passivation with Chlorinated Organic Salt for Highly Efficient and Stable Perovskite Solar Cells

Ambient Fabrication of Organic–Inorganic Hybrid Perovskite Solar Cells

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MAPbI3/agarose photoactive composite for highly stable unencapsulated perovskite solar cells in humid environment

Cited by 43 publications

References 47 publications

Improving Moisture/Thermal Stability and Efficiency of CH3NH3PbI3‐Based Perovskite Solar Cells via Gentle Butyl Acrylate Additive Strategy

Improving Moisture/Thermal Stability and Efficiency of CH3NH3PbI3‐Based Perovskite Solar Cells via Gentle Butyl Acrylate Additive Strategy

Examining the Interfacial Defect Passivation with Chlorinated Organic Salt for Highly Efficient and Stable Perovskite Solar Cells

Ambient Fabrication of Organic–Inorganic Hybrid Perovskite Solar Cells

Contact Info

Product

Resources

About

Improving Moisture/Thermal Stability and Efficiency of CH₃NH₃PbI₃‐Based Perovskite Solar Cells via Gentle Butyl Acrylate Additive Strategy

Improving Moisture/Thermal Stability and Efficiency of CH₃NH₃PbI₃‐Based Perovskite Solar Cells via Gentle Butyl Acrylate Additive Strategy