Spatial Distribution Recast for Organic Bulk Heterojunctions for High‐Performance All‐Inorganic Perovskite/Organic Integrated Solar Cells

Chen, Weijie; Li, Dong; Chen, Shanshan; Liu, Shuo; Shen, Yunxiu; Zeng, Guang Sheng; Zhu, Xiaozhang; Zhou, Erjun; Jiang, Lin; Li, Yaowen; Li, Yongfang

doi:10.1002/aenm.202000851

Cited by 41 publications

(28 citation statements)

References 55 publications

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“…Both samples show clear diffraction peaks at 15.2 , 21.4 , and 30.3 , corresponding to the (100), (110), and (200) planes of the α-phase CsPbIBr 2 , respectively. [24] Compared with the CsPbIBr 2 film, no impurity peaks are observed, which indicate that the BHJ layer does not have a clear impact on the crystallization of the CsPbIBr 2 layer. At the same time, the two samples have higher diffraction peak intensities in the (100) and ( 200) planes, indicating that the CsPbIBr 2 crystal has a <100> preferential orientation.…”

Section: Resultsmentioning

confidence: 94%

High‐Efficiency Carbon‐Based CsPbIBr₂ Solar Cells with Interfacial Energy Loss Suppressed by a Thin Bulk‐Heterojunction Layer

Wang

et al. 2021

Solar RRL

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By optimizing the perovskite preparation methods, modifying interfaces, and rationally transforming device structures, [1] the power conversion efficiency (PCE) of organic-inorganic hybrid perovskite solar cells (PSCs) has been significantly improved and the certified champion PCE of 25.5% has been attained. [2] Nevertheless, the hybrid perovskite PSCs cannot maintain stable performance under continuous light irradiation and heat or moisture attacks, which severely limit their commercialization. [3] Fortunately, it has been found that by substituting the organic components such as) in the hybrid perovskites with Cs þ ions, the all-inorganic CsPbBr x I 3Àx perovskites show better stability under the same conditions and maintain the excellent photoelectric properties such as a high absorption coefficient, fast charge carrier mobility, long charge carrier diffusion length, and good defect tolerance. [4,5] Specially, due to the undesirable phase transition from the black cubic phase to the yellow nonperovskite phase at room temperature, there are still obvious challenges to fabricating highly stable allinorganic CsPbI 3 PSCs, although they have the potential to achieve the highest photovoltaic performance. [6,7] It has been verified that the CsPbIBr 2 perovskite is ideal for balancing the stability and efficiency of all-inorganic PSCs. [8,9] Also, the all-inorganic CsPbIBr 2 PSCs have achieved a highest PCE of 11.53% through adjusting the bandgap by B-site element doping with SnI 2 , [10] yet it is still far from the photovoltaic performance of organic-inorganic hybrid counterparts. [2] Generally, there are two main reasons for the low efficiency of all-inorganic CsPbIBr 2 PSCs. The wide bandgap (2.08 eV) of CsPbIBr 2 perovskite limits its light absorption range (<600 nm) and the generated photocurrents. [11] The trap density at the CsPbIBr 2 layers or interfaces also causes an energy loss, which becomes more serious when using carbon electrodes. [12][13][14] Liu et al. first demonstrated that an integrated perovskite/bulk-heterojunction (BHJ) solar cell could efficiently harvest light and achieve a much higher PCE than the traditional one. Furthermore, they found that only the BHJ played a significant role in improving light absorption and photoelectric conversion at the same time, whereas the hole transport layer (HTL) even with good light absorption in a traditional PSC could not convert the additional absorbed light to photocurrents and contribute to the overall PCE. [15] Later, the integrated perovskite/BHJ solar cells generated wide attention because they can use both perovskite and a BHJ for wide-range light absorption to generate

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Section: Resultsmentioning

confidence: 94%

High‐Efficiency Carbon‐Based CsPbIBr₂ Solar Cells with Interfacial Energy Loss Suppressed by a Thin Bulk‐Heterojunction Layer

Wang

et al. 2021

Solar RRL

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“…b) As highlighted in this review, constructing novel semiconductor photoanode systems from the nanostructure-interface engineering perspective is the top challenge to realize highefficient PEC performance. In the photovoltaic fields, many promising materials have emerged with excellent power conversion performance, such as black phosphorus, [289] organicinorganic hybrid perovskite, [290,291] all-inorganic perovskite materials, [292,293] and MXenes. [294] It is of great interest to study whether these materials can also be applied in PEC reactions.…”

Section: Discussionmentioning

confidence: 99%

Engineering Nanostructure–Interface of Photoanode Materials Toward Photoelectrochemical Water Oxidation

et al. 2021

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In practical applications, solar energy is usually converted to other forms of energy, such as electric energy, [9][10][11] chemical energy, [12,13] thermal energy, [14,15] so as to facilitate further transportation and storage. Among them, photoelectrochemical (PEC) reactions from water to hydrogen, CO 2 to C2+ products, and N 2 to NH 3 in the aqueous-based environment have been considered to be quite promising solar-chemical energy conversion pathways. [16][17][18][19] Unlike the traditional water electrolyzing system, the most ideal PEC reaction system can be selfdriven by illumination without external bias. Utilizing the electron-hole carriers generated from the semiconductor photoelectrode, redox reactions take place separately on the photocathode and photoanode. However, as the water oxidation reaction involves a complex four-proton coupled multi-electron process (2H 2 O + 4h + → O 2 + 4H + , E o = 1.23 V vs reversible hydrogen electrode (RHE)), it makes the water oxidation reaction the rate-control step in the watersplitting reaction. [20] Therefore, developing high-performance photo anodes is of great fundamental importance and interest.At the present stage, TiO 2 is the most studied and applied semiconductor photoelectrocatalyst, due to its outstanding chemical stability. [21][22][23] However, as a wide bandgap semiconductor (anatase TiO 2 : 3.2eV, rutile TiO 2 : 3.0 eV), TiO 2 can only respond to the ultraviolet light. Meanwhile, as an intrinsic semiconductor, the bulk/surficial carrier recombination of TiO 2 greatly hinders its practical application. [24][25][26][27] In that case, some narrow bandgap semiconductors are also applied as the photoanode materials, such as Ta 3 N 5 (bandgap 2.1 eV), [28,29] BiVO 4 (bandgap 2.4 eV), and α-Fe 2 O 3 (bandgap 2.1 eV). [30][31][32] However, many of these narrow bandgap materials suffer from poor chemical stability and sluggish interfacial charge injection. [33][34][35] As intrinsic semiconductor materials, both wide and narrow bandgap semiconductor photoanode materials are suffering from the poor bulk-phase carrier separation, intense surficial e − /h + trapping recombination, and sluggish electrode/electrolyte carrier injection kinetics. [36][37][38][39] Fortunately, with the continuous investment of researchers, a series of modification methods have been established and the PEC water oxidation performance of semiconductor photoanode materials has been significantly improved. [32,[40][41][42][43][44] Among various strategies, nanostructure-interface engineering is widely regarded as an effective method to improve the PEC water oxidation performance: [40,41] the light-harvesting performance can be enhanced by the widened optical Photoelectrochemical (PEC) water oxidation based on semiconductor materials plays an important role in the production of clean fuel and value-added chemicals. Nanostructure-interface engineering has proven to be an effective way to construct highly efficient PEC water oxidation photoanodes with good light capture, carrier transport, and ...

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“…The wide bandgaps dramatically constrain the absorption edges of absorbers, leading to a low photovoltaic performance for single‐junction solar cells. [60–65] On the other hand, these perovskites are promising top cell candidates for tandem and triple‐junction perovskite‐based solar cells.…”

Section: Fundaments Of Inorganic Perovskitesmentioning

confidence: 99%

Engineering inorganic lead halide perovskite deposition toward solar cells with efficiency approaching 20%

Qiu

et al. 2021

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Inorganic perovskite materials have gained tremendous attention due to their superior chemical and thermal stability than organic‐inorganic hybrid perovskites. In the past years, substantial research efforts have been devoted to developing uniform and pin‐hole free inorganic perovskite films with high electronic quality. As a result, power conversion efficiency of inorganic perovskite solar cells (PSCs) has boosted to over 19%, which presents a promising potential for technology commercialization. Herein, we give a comprehensive review of the recent progress on state‐of‐the‐art inorganic cesium lead halide based PSCs, particularly on the perovskite deposition approaches. We show a clear roadmap to fabricate high electronic quality inorganic perovskite films by tuning the precursor crystallization kinetics, performing post‐deposition treatments, and passivating surface/interface defects. Inorganic perovskite films prepared by these approaches exhibit not only high crystallinity, favorable morphology, and low trap densities but also improved phase stability. The advanced deposition approaches lay the foundation for further improving the performance and long‐term operational stability of inorganic perovskite photovoltaics.

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Spatial Distribution Recast for Organic Bulk Heterojunctions for High‐Performance All‐Inorganic Perovskite/Organic Integrated Solar Cells

Cited by 41 publications

References 55 publications

High‐Efficiency Carbon‐Based CsPbIBr₂ Solar Cells with Interfacial Energy Loss Suppressed by a Thin Bulk‐Heterojunction Layer

High‐Efficiency Carbon‐Based CsPbIBr₂ Solar Cells with Interfacial Energy Loss Suppressed by a Thin Bulk‐Heterojunction Layer

Engineering Nanostructure–Interface of Photoanode Materials Toward Photoelectrochemical Water Oxidation

Engineering inorganic lead halide perovskite deposition toward solar cells with efficiency approaching 20%

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Spatial Distribution Recast for Organic Bulk Heterojunctions for High‐Performance All‐Inorganic Perovskite/Organic Integrated Solar Cells

Cited by 41 publications

References 55 publications

High‐Efficiency Carbon‐Based CsPbIBr2 Solar Cells with Interfacial Energy Loss Suppressed by a Thin Bulk‐Heterojunction Layer

High‐Efficiency Carbon‐Based CsPbIBr2 Solar Cells with Interfacial Energy Loss Suppressed by a Thin Bulk‐Heterojunction Layer

Engineering Nanostructure–Interface of Photoanode Materials Toward Photoelectrochemical Water Oxidation

Engineering inorganic lead halide perovskite deposition toward solar cells with efficiency approaching 20%

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High‐Efficiency Carbon‐Based CsPbIBr₂ Solar Cells with Interfacial Energy Loss Suppressed by a Thin Bulk‐Heterojunction Layer

High‐Efficiency Carbon‐Based CsPbIBr₂ Solar Cells with Interfacial Energy Loss Suppressed by a Thin Bulk‐Heterojunction Layer