Bottom Interfacial Engineering for Methylammonium‐Free Regular‐Structure Planar Perovskite Solar Cells over 21%

Leng, Shibing; Wang, Luyao; Wang, Xin; Zhang, Zhanfei; Liang, Jianghu; Zheng, Yiting; Jiang, Jie-Hong; Zhang, Zhiang; Liu, Xiao; Qiu, Yuankun; Chen, Chun‐Chao

doi:10.1002/solr.202100285

Cited by 13 publications

(3 citation statements)

References 54 publications

(80 reference statements)

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“…The device based on these newly developed ZnO QDs resulted in a champion PCE of 20.05%. Leng et al (2021) treated the ZnO nanoparticle-processed ETL via 4,7-dichloro-1,10-phenanthroline (Cl-phen) and 1,10bathophenanthroline (BPhen). This can suppress the -OH group content on the ZnO surface.…”

Section: Zinc Oxide (Zno)mentioning

confidence: 99%

Celebrating 1 year of Frontiers in Electronic Materials

2024

Frontiers Research Topics

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Frontiers is more than just an open access publisher of scholarly articles: it is a pioneering approach to the world of academia, radically improving the way scholarly research is managed. The grand vision of Frontiers is a world where all people have an equal opportunity to seek, share and generate knowledge. Frontiers provides immediate and permanent online open access to all its publications, but this alone is not enough to realize our grand goals. Frontiers journal seriesThe Frontiers journal series is a multi-tier and interdisciplinary set of openaccess, online journals, promising a paradigm shift from the current review, selection and dissemination processes in academic publishing. All Frontiers journals are driven by researchers for researchers; therefore, they constitute a service to the scholarly community. At the same time, the Frontiers journal series operates on a revolutionary invention, the tiered publishing system, initially addressing specific communities of scholars, and gradually climbing up to broader public understanding, thus serving the interests of the lay society, too. Dedication to qualityEach Frontiers article is a landmark of the highest quality, thanks to genuinely collaborative interactions between authors and review editors, who include some of the world's best academicians. Research must be certified by peers before entering a stream of knowledge that may eventually reach the public -and shape society; therefore, Frontiers only applies the most rigorous and unbiased reviews. Frontiers revolutionizes research publishing by freely delivering the most outstanding research, evaluated with no bias from both the academic and social point of view. By applying the most advanced information technologies, Frontiers is catapulting scholarly publishing into a new generation. What are Frontiers Research Topics?Frontiers Research Topics are very popular trademarks of the Frontiers journals series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area.

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Section: Zinc Oxide (Zno)mentioning

confidence: 99%

Celebrating 1 year of Frontiers in Electronic Materials

2024

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“…Organic–inorganic hybrid perovskites have become promising optoelectronic materials due to their high carrier mobility, tunable direct band gap, low exciton binding energy, and long carrier diffusion length. − The power conversion efficiency (PCE) of perovskite solar cells (PSC) has rapidly climbed from 3.8 to 25.7% in the past decade. − The preparation methods of PSC mainly include spin-coating, ,,− vapor deposition, and thermal evaporation . Among them, the spin-coating method is the most widely used, and it can be divided into a one-step solution method , and a sequential deposition method. − In the sequential deposition method, perovskite films are obtained by the reaction of lead halide films (such as PbI 2 ) with organic halide solutions (such as formamidine iodide and methylammonium iodide). Compared with the one-step method, the sequential deposition method is reproducible and more easily forms vertically grown perovskite crystals .…”

Section: Introductionmentioning

confidence: 99%

“…6−12 The preparation methods of PSC mainly include spin-coating, 10,11,13−15 vapor deposition, 16 and thermal evaporation. 17 Among them, the spin-coating method is the most widely used, and it can be divided into a one-step solution method 4,18 and a sequential deposition method. 19−25 In the sequential deposition method, perovskite films are obtained by the reaction of lead halide films (such as PbI 2 ) with organic halide solutions (such as formamidine iodide and methylammonium iodide).…”

Section: Introductionmentioning

confidence: 99%

Direct In Situ Conversion of Lead Iodide to a Highly Oriented and Crystallized Perovskite Thin Film via Sequential Deposition for 23.48% Efficient and Stable Photovoltaic Devices

Zhou

Liang

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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In the sequential deposition method of perovskite films, the crystallinity and microstructure of PbI 2 are often sacrificed to solve the problem of an incomplete reaction between organic halide and lead halide. As a result, the crystal orientation of the perovskite film prepared by the sequential deposition method is generally worse than that of the perovskite film prepared by a onestep antisolvent method. Here, we preplaced formamidine formate (FAFa) on the buried interface to regulate the formation mechanism from PbI 2 to perovskite. As shown by the XPS measurement of the perovskite buried interface, the HCOO − anion of FAFa first partially replaces I − to coordinate with Pb 2+ . With the subsequent annealing process, some HCOO − anions were released and migrated upward, which promoted the recrystallization of PbI 2 , obtaining a PbI 2 film with enhanced crystallinity and orientation. Additionally, the lift-off process proves that the HCOO − anions suppress the anion vacancy defects enriched at the buried interface and promote charge transport because the HCOO − anions are small enough to adapt to the iodide vacancy. Grazing incidence wideangle X-ray scattering and X-ray diffraction measurements show that the in situ conversion mechanism is responsible for the PbI 2 -toperovskite process, resulting in the highly oriented perovskite film without increasing the residual PbI 2 content in the perovskite film. As a result, our strategies enabled a champion power conversion efficiency of 23.48% with improved storage stability and photostability. This work provides a new strategy to improve the crystallinity of sequential deposition perovskites without destabilizing the device due to more PbI 2 residues.

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Organic Ligand‐Free ZnO Quantum Dots for Efficient and Stable Perovskite Solar Cells

Chavan

Wolska‐Pietkiewicz

Prochowicz

et al. 2022

Adv Funct Materials

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Zinc oxide (ZnO) is a promising electron‐transport layer (ETL) in thin‐film photovoltaics. However, the poor chemical compatibility between commonly used sol–gel‐derived ZnO nanostructures and organo–metal halide perovskites makes it highly challenging to obtain efficient and stable perovskite solar cells (PSCs). Here, a novel approach is reported for low‐temperature processed pure ZnO ETLs for planar heterojunction PSCs based on ZnO quantum dots (QDs) stabilized by dimethyl sulfoxide (DMSO) as easily removable solvent molecules. With no need for the ETL doping or surface modification, the champion PSC comprising the mixed‐cation and mixed‐halide Cs5(MA0.17FA0.83)95Pb(I0.83Br0.17)3 absorber layer reaches a maximum power conversion efficiency of 20.05%, which is significantly higher than that obtained for a reference device based on a standard sol–gel‐derived ZnO nanostructured layer (17.78%). Thus, along with the observed better operational stability in ambient conditions and elevated temperature, the champion device achieves the state‐of‐the‐art performance among reported non‐passivated pure ZnO ETL‐based PSCs. The improved photovoltaic performance is attributed to both a higher uniformity of the surface morphology and a lower defects density of films based on the organometallic‐derived QDs that are likely to ensure the enhanced stability of the ZnO/perovskite interface.

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Bottom Interfacial Engineering for Methylammonium‐Free Regular‐Structure Planar Perovskite Solar Cells over 21%

Cited by 13 publications

References 54 publications

Celebrating 1 year of Frontiers in Electronic Materials

Celebrating 1 year of Frontiers in Electronic Materials

Direct In Situ Conversion of Lead Iodide to a Highly Oriented and Crystallized Perovskite Thin Film via Sequential Deposition for 23.48% Efficient and Stable Photovoltaic Devices

Organic Ligand‐Free ZnO Quantum Dots for Efficient and Stable Perovskite Solar Cells

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