All-perovskite tandem solar cells with improved grain surface passivation

Lin, Renxing; Xu, Jian; Wei, Mingyang; Wang, Yurui; Qin, Zhengyuan; Liu, Zhou; Wu, Jinlong; Xiao, Ke; Chen, Bin; Park, Somin; Chen, Gang; Atapattu, Harindi R.; Graham, Kenneth R.; Xu, Jun; Zhu, Jia; Li, Ludong; Zhang, Chunfeng; Sargent, Edward H.; Hui‐min, Tan

doi:10.1038/s41586-021-04372-8

Cited by 724 publications

(596 citation statements)

References 48 publications

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“… 16 An important feature of perovskites is the possibility to fine-tune their bandgap by compositional engineering, 17 − 20 making them suitable for single- and multi-junction solar cells. 21 − 27 In tandem devices, perovskite compositions with wide bandgaps (>1.65 eV) are needed in order to exceed the theoretical efficiency limit of single-junction solar cells. 28 , 29 These compositions are obtained by using mixed iodide/bromide formulations, where mixed A-site cations are typically employed to improve the photo- and thermal stability of the compounds.…”

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confidence: 99%

Quadruple-Cation Wide-Bandgap Perovskite Solar Cells with Enhanced Thermal Stability Enabled by Vacuum Deposition

et al. 2022

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Vacuum processing of multicomponent perovskites is not straightforward, because the number of precursors is in principle limited by the number of available thermal sources. Herein, we present a process which allows increasing the complexity of the formulation of vacuum-deposited lead halide perovskite films by multisource deposition and premixing both inorganic and organic components. We apply it to the preparation of wide-bandgap CsMAFA triple-cation perovskite solar cells, which are found to be efficient but not thermally stable. With the aim of stabilizing the perovskite phase, we add guanidinium (GA + ) to the material formulation and obtained CsMAFAGA quadruple-cation perovskite films with enhanced thermal stability, as observed by X-ray diffraction and rationalized by microstructural analysis. The corresponding solar cells showed similar performance with improved thermal stability. This work paves the way toward the vacuum processing of complex perovskite formulations, with important implications not only for photovoltaics but also for other fields of application.

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confidence: 99%

Quadruple-Cation Wide-Bandgap Perovskite Solar Cells with Enhanced Thermal Stability Enabled by Vacuum Deposition

et al. 2022

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“…To decrease and reduce its toxicity level, Pb-free [164][165][166] (or at the very least less Pb content) perovskite-silicon PVs have been researched using a safer option by mixing chalcogen and halogen anions [167] or using tin or (Sn)-based perovskite PVs [168][169][170]. Recently, it was determined that there is an all-perovskite Pb-Sn tandem photovoltaic with a PCE of 26.4% [171], showing a value that potentially exceeds that of the best-performing single-junction perovskite solar cells, which are capable of retaining more than 90% of their initial performance after 600 h of operation at maximum power under one-sun illumination under ambient conditions. Recent research [172], developed a low-cost device made of sulfonic acid-based lead-adsorbing resin, which freezes lead ions into a scaffold and prevents their leakage when the perovskites are exposed to rainfall.…”

Section: Improvements To Perovskite Materials and Its Tandem Structuresmentioning

confidence: 99%

Hybrid Organic–Inorganic Perovskite Halide Materials for Photovoltaics towards Their Commercialization

et al. 2022

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Hybrid organic–inorganic perovskite (HOIP) photovoltaics have emerged as a promising new technology for the next generation of photovoltaics since their first development 10 years ago, and show a high-power conversion efficiency (PCE) of about 29.3%. The power-conversion efficiency of these perovskite photovoltaics depends on the base materials used in their development, and methylammonium lead iodide is generally used as the main component. Perovskite materials have been further explored to increase their efficiency, as they are cheaper and easier to fabricate than silicon photovoltaics, which will lead to better commercialization. Even with these advantages, perovskite photovoltaics have a few drawbacks, such as their stability when in contact with heat and humidity, which pales in comparison to the 25-year stability of silicon, even with improvements are made when exploring new materials. To expand the benefits and address the drawbacks of perovskite photovoltaics, perovskite–silicon tandem photovoltaics have been suggested as a solution in the commercialization of perovskite photovoltaics. This tandem photovoltaic results in an increased PCE value by presenting a better total absorption wavelength for both perovskite and silicon photovoltaics. In this work, we summarized the advances in HOIP photovoltaics in the contact of new material developments, enhanced device fabrication, and innovative approaches to the commercialization of large-scale devices.

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“…PSCs can be classified into two distinct structures based on the order of hole transporting layers and electron transporting layers (ETLs), namely the regular structure and the inverted structure. Though regular structure PSCs have had the highest performance to date [ 2 ], inverted structure PSCs have attracted growing attentions due to their stable and reliable performance [ 3 ] as well as their practicability in high-efficiency tandem solar cells [ 4 ]. Nevertheless, the Shockley-Queisser (S-Q) limit determines the maximum PCE for both types of devices.…”

Section: Introductionmentioning

confidence: 99%

Tailoring Functional Terminals on Solution-Processable Fullerene Electron Transporting Materials for High Performance Perovskite Solar Cells

et al. 2022

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Widely known as an excellent electron transporting material (ETM), pristine fullerene C60 plays a critical role in improving the photovoltaic performance of inverted structure perovskite solar cells (PSCs). However, the imperfect perovskite/C60 interface significantly limits the promotion of device performance and stability due to the weak coordination interactions between bare carbon cages and perovskite. Here, we designed and synthesized three functionalized fulleropyrrolidine ETMs (abbreviated as CEP, CEPE, and CECB), each of which was modified with the same primary terminal (cyanoethyl) and various secondary terminals (phenyl, phenethyl, and chlorobutyl). The resulting CECB-based PSC has a power conversion efficiency (PCE) over 19% and exceptional photo-stability over 1800 h. This work provides significant insight into the targeted terminal design of novel fullerene ETMs for efficient and stable PSCs.

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All-perovskite tandem solar cells with improved grain surface passivation

Cited by 724 publications

References 48 publications

Quadruple-Cation Wide-Bandgap Perovskite Solar Cells with Enhanced Thermal Stability Enabled by Vacuum Deposition

Quadruple-Cation Wide-Bandgap Perovskite Solar Cells with Enhanced Thermal Stability Enabled by Vacuum Deposition

Hybrid Organic–Inorganic Perovskite Halide Materials for Photovoltaics towards Their Commercialization

Tailoring Functional Terminals on Solution-Processable Fullerene Electron Transporting Materials for High Performance Perovskite Solar Cells

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