Versatile Bidentate Chemical Passivation on a Cesium Lead Inorganic Perovskite for Efficient and Stable Photovoltaics

Gao, Changji; Zhang, Fanghui; Gu, Xiaojing; Huang, Jin; Wang, Kang; Zhang, Shiang; Liu, Shengzhong; Tian, Qingwen

doi:10.1021/acsaem.1c00380

Cited by 22 publications

(16 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After NaDDTC treatment, the hysteresis in the PSCs is effectively reduced and the FF is increased, which can be interpreted that the decreased surface defects of the CsPbI 3−x Br x film from NaDDTC treatment could inhibit deeper trap effects and ion migration as well as promote the carrier dynamics at the interface in these CsPbI 3−x Br x PSCs. [58,59] According to previous reports, the defects at interfaces and GBs are the most vulnerable sites for inducing degradation of perovskite films. [60,61] The environmental stability of the CsPbI 3−x Br x perovskite films was further evaluated.…”

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Synchronous Surface Reconstruction and Defect Passivation for High‐Performance Inorganic Perovskite Solar Cells

Zhang

Tian

et al. 2022

Small

Self Cite

View full text Add to dashboard Cite

commercialization due to ever-increasing power conversion efficiency (PCE), which has soared to 25.7% as of 2022. [1][2][3][4] Nonetheless, the inadequate stability caused by thermal degradation of hybrid perovskite still poses a great challenge for commercialization. [5] To circumvent this concern, all-inorganic cesium lead halide perovskites (CsPbX 3 , X = Br, I), whose volatile and vulnerable organic parts can be replaced by stable inorganic Cs + , have attracted considerable attention and exhibited great potential for both high-performance single-junction and top cells in tandem soar cells due to their unparalleled stability at high temperature. [6][7][8] In recent years, thanks to a lot of research work and incisive investigation, cesium-based inorganic perovskites have made remarkable progress in reducing the defect densities and stabilizing the black phase in the perovskite films, due especially to precursor solution optimization, [9][10][11][12] compositional engineering, [13][14][15] interface modification [16][17][18][19] and strain engineering. [6,20] Despite these unremitting efforts, the current record PCE is considerably lower than that of its hybrid counterpart and the Shockley-Queisser (S-Q) limit (≈30%). [21] This shortcoming is ascribed to a large energy loss (E loss ), suggesting that severe Shockley-Read-Hall recombination occurs in the interface or absorber layer in these solar cells, which is mainly attributed to the inevitable formation of a large number of shallow-or deeplevel defects in the crystal growth of CsPbI 3−x Br x film. [21][22][23] These undesirable defects, especially deep-level defects, are considered as nonradiative recombination centers and active sites for water adsorption. As a result, they tend to cause inferior device performance and long-term instability. [24] Thus, it is of great significance to prepare superior perovskite films with low-defect density for obtaining high-efficiency solar cells.Recently, intensive research on the deep-level physical mechanism of inorganic perovskite has led to improvements of the efficiency and stability of inorganic perovskite devices. [25][26][27][28] Lou et al. demonstrated the there are many point defects in inorganic perovskite, such as the Cs + vacancy (V Cs ) and undercoordinated Pb 2+ , etc. These inevitable defects can impair the interaction between Cs + and [PbI 6 ] 4− octahedra to some extent, thus reducing the energy difference between the black phase and yellow phase. [24,25] According to density functional theoryThe nonradiative charge recombination caused by surface defects and inferior crystalline quality are major roadblocks to further enhancing the performance of CsPbI 3−x Br x perovskite solar cells (PSCs). Theoretical calculations indicate that sodium diethyldithiocarbamate (NaDDTC), a popular bacteriostatic benign material, can initiate multiple interactions with the CsPbI 3−x Br x perovskite surface to effectively passivate the defects. The experimental results reveal that the NaDDTC can indeed passivate the elect...

show abstract

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Synchronous Surface Reconstruction and Defect Passivation for High‐Performance Inorganic Perovskite Solar Cells

Zhang

Tian

et al. 2022

Small

Self Cite

View full text Add to dashboard Cite

show abstract

“…Since 2015, great efforts have been made to develop effective strategies to stabilize the α ‐phase of CsPbI 3 perovskite, [ 6–8 ] such as precursor solution engineering, [ 9–12 ] compositional engineering, [ 13–15 ] interface engineering, [ 16–20 ] dimensional engineering. [ 21–25 ] These strategies are found to not only enhance the stability but also boost the PCE of the PSCs by improving the quality of all‐inorganic perovskite film.…”

Section: Introductionmentioning

confidence: 99%

Ternary Halogen Doping for Efficient and Stable Air‐Processed All‐Inorganic Perovskite Solar Cells

Gao

Chao

et al. 2022

Solar RRL

View full text Add to dashboard Cite

Metal halide perovskites have emerged as the revolutionary semiconductor material in the field of various optoelectronic applications, among which perovskite solar cells (PSCs) have raced to the front in the third-generation photovoltaics. Notably, the single-junction PSCs based on organic-inorganic hybrid perovskites have recently achieved certified power conversion efficiency (PCE) of 25.5%. [1] However, organic-inorganic hybrid perovskites suffer from the long-term instability problem due to the presence of organic component that is sensitive to unfavorable conditions, including moisture, UV light, oxygen, and temperature. [2] To overcome this deficiency, all-inorganic perovskites (i.e., CsPbI 3 ) have drawn much attention mainly owing to their superior thermal stability [3] and high theoretical PCE of 28%. [4] However, the stability of CsPbI 3 with cubic phase (also known as α-phase or black phase) is shown to be poor under ambient conditions because of the spontaneous phase transition from photoactive cubic phase into orthorhombic non-perovskite δ-phase. [5] Therefore, the improvement of phase stability is of primary significance to achieve efficient and stable all-inorganic PSCs.Since 2015, great efforts have been made to develop effective strategies to stabilize the α-phase of CsPbI 3 perovskite, [6][7][8] such as precursor solution engineering, [9][10][11][12] compositional engineering, [13][14][15] interface engineering, [16][17][18][19][20] dimensional engineering. [21][22][23][24][25] These strategies are found to not only enhance the stability but also boost the PCE of the PSCs by improving the quality of all-inorganic perovskite film. Very recently, record-high PCE of 20.8% has been achieved in CsPbI 3 -based PSCs by developing the rational surface-defect control strategy, demonstrating the great promise of all-inorganic PSCs. [26] However, the currently adopted fabrication processes of all-inorganic CsPbI 3 perovskite film are strictly in an inert atmosphere to ensure the production of high-performing PSCs, which greatly impedes their feasibility in large-scale production. Recently, Br-based allinorganic perovskites have also been investigated due to the superior stability and high open-circuit voltage the device could achieve, [27][28][29][30][31][32][33] suggesting the great potential of halogen-doping strategy in enhancing the stability of all-inorganic perovskites.

show abstract

“…The compounds belonging to the family of perovskites show a great variety of mechanical, magnetic, and optical properties − and for these reasons are currently key materials for many technologies . A few examples include piezoelectrics, photovoltaic solar cells, , multiferroics, , and magnetoelectrics …”

Section: Introductionmentioning

confidence: 99%

“…The compounds belonging to the family of perovskites show a great variety of mechanical, magnetic, and optical properties 1−5 and for these reasons are currently key materials for many technologies. 6 A few examples include piezoelectrics, 7 photovoltaic solar cells, 8,9 multiferroics, 10,11 and magnetoelectrics. 12 In the past decade, the most studied materials within the family of perovskites have been based on hybrid organic/ inorganic systems with the general formula ABX 3 ; in particular, CH 3 NH 3 PbX 3 with X = Br, Cl, I have been the most investigated materials.…”

Section: Introductionmentioning

confidence: 99%

Surfactant-Free Synthesis of the Full Inorganic Perovskite CsPbBr₃: Evolution and Phase Stability of CsPbBr₃ vs CsPb₂Br₅ and Their Photocatalytic Properties

Pellegrino

Malandrino

2021

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

In the present study, the successful fabrication, through a surfactant-free one-pot synthesis in ethanol solution, of the all-inorganic halide perovskite CsPbBr3 has been achieved. The phase formation has been obtained for the first time, using the β-diketonate complexes [Pb(hfa)2diglyme]2 and Cs(hfa) (Hhfa = 1,1,1,5,5,5-hexafluoro-2,4-pentanedione; diglyme = 2-methoxyethyl ether) and Br2 as the precipitating agent. The growth of CsPb2Br5 microcrystals has been obtained and stabilized under specific synthetic conditions, by controlling the phase transition from CsPbBr3 to CsPb2Br5 as well. The entire process was operated under acid-catalyzed conditions without any need of humidity control and hazardous organic solvents. The control of the aging time and the phase stability during the heat treatment represent the key points in order to selectively and reproducibly obtain the CsPbBr3 or CsPb2Br5 phases. Structural, morphological, and compositional characterizations of the final product show the formation of square microcrystals, with a grain size of up to 3 μm, of the pure and stable perovskite CsPbBr3 phase. Finally, promising results in photocatalytic degradation tests using rhodamine B solution have been obtained under UV light (λ = 360 nm) and visible light, showing high degradation yields of up to 81.9% and 58.4% for CsPbBr3 and CsPb2Br5, respectively.

show abstract

Versatile Bidentate Chemical Passivation on a Cesium Lead Inorganic Perovskite for Efficient and Stable Photovoltaics

Cited by 22 publications

References 48 publications

Synchronous Surface Reconstruction and Defect Passivation for High‐Performance Inorganic Perovskite Solar Cells

Synchronous Surface Reconstruction and Defect Passivation for High‐Performance Inorganic Perovskite Solar Cells

Ternary Halogen Doping for Efficient and Stable Air‐Processed All‐Inorganic Perovskite Solar Cells

Surfactant-Free Synthesis of the Full Inorganic Perovskite CsPbBr₃: Evolution and Phase Stability of CsPbBr₃ vs CsPb₂Br₅ and Their Photocatalytic Properties

Contact Info

Product

Resources

About

Versatile Bidentate Chemical Passivation on a Cesium Lead Inorganic Perovskite for Efficient and Stable Photovoltaics

Cited by 22 publications

References 48 publications

Synchronous Surface Reconstruction and Defect Passivation for High‐Performance Inorganic Perovskite Solar Cells

Synchronous Surface Reconstruction and Defect Passivation for High‐Performance Inorganic Perovskite Solar Cells

Ternary Halogen Doping for Efficient and Stable Air‐Processed All‐Inorganic Perovskite Solar Cells

Surfactant-Free Synthesis of the Full Inorganic Perovskite CsPbBr3: Evolution and Phase Stability of CsPbBr3 vs CsPb2Br5 and Their Photocatalytic Properties

Contact Info

Product

Resources

About

Surfactant-Free Synthesis of the Full Inorganic Perovskite CsPbBr₃: Evolution and Phase Stability of CsPbBr₃ vs CsPb₂Br₅ and Their Photocatalytic Properties