A Two-Step Solution-Processed Wide-Bandgap Perovskite for Monolithic Silicon-Based Tandem Solar Cells with &gt;27% Efficiency

Chen, Bingbing; Wang, Pengyang; Li, Renjie; Ren, Ningyu; Han, Wei; Zhu, Zheng; Wang, Jin; Wang, Sanlong; Shi, Bowen; Liu, Jingjing; Liu, Pengfei; Huang, Qian; Xu, Shengzhi; Zhao, Ying; Zhang, Xiaodan

doi:10.1021/acsenergylett.2c01488

Cited by 28 publications

(27 citation statements)

References 33 publications

(36 reference statements)

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“…Solar cells gave a PCE of 20.35% with a high fill factor of 81.53% [237]. Chen et al introduced formamidinium iodide (FAI) and rubidium acetate (RbAc) into the PbI 2 /PbBr 2 complex to create temperate particle size for nucleation site, thus facilitating the diffusion of FAI/MABr/MACl [238]. While the control PbI 2 / PbBr 2 film demonstrated better crystallinity and larger grain size, which would definitely impede the diffusion of organic salts, resulting in incomplete conversion.…”

Section: Preparation Methodsmentioning

confidence: 99%

Recent Advances in Wide-Bandgap Organic–Inorganic Halide Perovskite Solar Cells and Tandem Application

et al. 2023

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Perovskite-based tandem solar cells have attracted increasing interest because of its great potential to surpass the Shockley–Queisser limit set for single-junction solar cells. In the tandem architectures, the wide-bandgap (WBG) perovskites act as the front absorber to offer higher open-circuit voltage (VOC) for reduced thermalization losses. Taking advantage of tunable bandgap of the perovskite materials, the WBG perovskites can be easily obtained by substituting halide iodine with bromine, and substituting organic ions FA and MA with Cs. To date, the most concerned issues for the WBG perovskite solar cells (PSCs) are huge VOC deficit and severe photo-induced phase separation. Reducing VOC loss and improving photostability of the WBG PSCs are crucial for further efficiency breakthrough. Recently, scientists have made great efforts to overcome these key issues with tremendous progresses. In this review, we first summarize the recent progress of WBG perovskites from the aspects of compositions, additives, charge transport layers, interfaces and preparation methods. The key factors affecting efficiency and stability are then carefully discussed, which would provide decent guidance to develop highly efficient and stable WBG PSCs for tandem application.

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Section: Preparation Methodsmentioning

confidence: 99%

Recent Advances in Wide-Bandgap Organic–Inorganic Halide Perovskite Solar Cells and Tandem Application

et al. 2023

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“…The perovskite‐based multi‐junction tandem solar cells (TSCs) have attracted much attention due to their potential to break the SQ limit, thereby can achieve higher PCE. [ 7–12 ] As top cells for TSCs, the wide‐bandgap (WBG, >1.63 eV) PSCs play an essential role in harvesting the high‐energy photons and achieving high open‐circuit voltage ( V oc ). [ 13–20 ] Therefore, the exploration of high‐performance wide‐bandgap perovskites is of great importance for the development of perovskite‐based TSCs.…”

Section: Introductionmentioning

confidence: 99%

Pure‐Iodide Wide‐Bandgap Perovskites for High‐Efficiency Solar Cells by Crystallization Control

Zhang

Wang

et al. 2023

Adv Funct Materials

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Wide‐bandgap perovskite is a vital part of perovskite‐based tandem solar cells. Currently, wide‐bandgap perovskites are typically based on mixed‐halide (I/Br) materials, but suffer from photoinduced phase separation. The pure‐iodide formamidine/cesium (FA/Cs) based FAxCs1−xPbI3 perovskites with high Cs content are good candidates, whereas the control of crystallization is challenging due to the complex crystallization kinetics. Here, pure‐iodide FA0.5Cs0.5PbI3 wide‐bandgap perovskite solar cells is reported. As an acidic diammonium salt, methylenediaminium dichloride (MDACl2) is applied as an additive to control the whole crystallization process of perovskite films, including both nucleation and crystal growth. Starting from the solution chemistry, the MDACl2 additive with acidity and strong solvation properties can effectively regulate the chemical composition of perovskite precursor, thus inhibiting the growth of undesired 1D intermediates during the nucleation process. Besides, the incorporation of larger‐sized MDA2+ into the lattice compensates for the tolerance factor and accelerates the ion exchange reaction between FA+ and Cs+ in the crystal growth process. As a result, the crystallinity of the perovskite films is significantly improved, benefitting from the dual function of MDACl2. Finally, the efficiency of hole transport layer‐free carbon electrode‐based wide‐bandgap perovskite solar cells reaches 18.52%, which is the highest reported so far.

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“…To achieve high-efficiency four-terminal perovskite/silicon tandem solar cells, the performance of top semitransparent PSCs should be well optimized, of which the preparation of pure-phase, large-grained wide-band-gap perovskite films is extremely crucial. − The perovskite films are expected to contain fewer grain boundaries, interstitials, vacancies, and dangling bonds, contributing to the weaker nonradiative recombination and hence the better PCEs of final semitransparent PSCs. A one-step spin-coating method is generally adopted to prepare the wide-band-gap perovskite films, since it can modify the composition of lead halide perovskite film precisely and enable a film with the expected band gap. ,− However, it is currently difficult to obtain one with satisfactory characteristics in terms of surface coverage, thickness, crystallinity, stability, etc. The Pb(SCN) 2 additive strategy has been proposed to overcome the above issues.…”

Section: Introductionmentioning

confidence: 99%

Pure-Phase, Large-Grained Wide-Band-Gap Perovskite Films for High-Efficiency, Four-Terminal Perovskite/Silicon Tandem Solar Cells

Ma,

Zhu,

Han

et al. 2023

ACS Appl. Mater. Interfaces

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High-quality, stable perovskite films with a wide band gap between 1.65 and 1.80 eV are highly suitable for efficient and cost-competitive silicon-based tandem solar cells. Herein, we demonstrate that the combined strategies of the Pb(SCN)2 additive and air annealing can enable the Cs0.22FA0.78Pb(I0.85Br0.15)3 films with a wide band gap of 1.65 eV and favored properties including pure composition, high crystallinity, micro-sized grains, and reduced defects. With these desired films, the average efficiencies of semitransparent perovskite solar cells (PSCs) are boosted from (18.13 ± 0.31) to (20.35 ± 0.28)%. Further, the semitransparent PSC is used to assemble the four-terminal perovskite/TOPCon tandem solar cell. Benefiting from its excellent performance and preferred optical properties, the obtained tandem solar cell yields a milestone efficiency of 30.32%.

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A Two-Step Solution-Processed Wide-Bandgap Perovskite for Monolithic Silicon-Based Tandem Solar Cells with >27% Efficiency

Cited by 28 publications

References 33 publications

Recent Advances in Wide-Bandgap Organic–Inorganic Halide Perovskite Solar Cells and Tandem Application

Recent Advances in Wide-Bandgap Organic–Inorganic Halide Perovskite Solar Cells and Tandem Application

Pure‐Iodide Wide‐Bandgap Perovskites for High‐Efficiency Solar Cells by Crystallization Control

Pure-Phase, Large-Grained Wide-Band-Gap Perovskite Films for High-Efficiency, Four-Terminal Perovskite/Silicon Tandem Solar Cells

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