Hydrogen-bond-bridged intermediate for perovskite solar cells with enhanced efficiency and stability

Li, Fengzhu; Deng, Xiang; Shi, Zhangsheng; Wu, Shengfan; Zeng, Zixin; Wang, Deng; Li, Yang; Feng, Qi; Zhang, Zhuomin; Yang, Zhengbao; Jang, Sei‐Hum; Lin, Francis; Tsang, Sai‐Wing; Chen, Xiankai; Jen, Alex K.‐Y.

doi:10.1038/s41566-023-01180-6

Cited by 121 publications

(43 citation statements)

References 48 publications

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“…S16) reported a QSS PCE of 25.1% for an illuminated area of 0.05 cm 2 along with a fast-scan PCE of 25.9%, compared with other reported certified QSS PCEs that did not exceed 25% (Fig. 4C and table S2) ( 9 , 10 , 40 , 41 ). We also fabricated 1.5 cm 2 devices using the DMDP treatment that delivered a PCE of 24.0% (fig.…”

Section: Photovoltaic Performancementioning

confidence: 71%

Bimolecularly passivated interface enables efficient and stable inverted perovskite solar cells

Liu,

Yang,

Chen

et al. 2023

Science

141

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Compared with the n-i-p structure, inverted (p-i-n) perovskite solar cells (PSCs) promise increased operating stability, but these photovoltaic cells often exhibit lower power conversion efficiencies (PCEs) because of nonradiative recombination losses, particularly at the perovskite/C 60 interface. We passivated surface defects and enabled reflection of minority carriers from the interface into the bulk using two types of functional molecules. We used sulfur-modified methylthio molecules to passivate surface defects and suppress recombination through strong coordination and hydrogen bonding, along with diammonium molecules to repel minority carriers and reduce contact-induced interface recombination achieved through field-effect passivation. This approach led to a fivefold longer carrier lifetime and one-third the photoluminescence quantum yield loss and enabled a certified quasi-steady-state PCE of 25.1% for inverted PSCs with stable operation at 65°C for >2000 hours in ambient air. We also fabricated monolithic all-perovskite tandem solar cells with 28.1% PCE.

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Section: Photovoltaic Performancementioning

confidence: 71%

Bimolecularly passivated interface enables efficient and stable inverted perovskite solar cells

Liu,

Yang,

Chen

et al. 2023

Science

141

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“…Apart from engineering the perovskite compositions [5] and crystallization kinetics, [6][7] interfacial engineering has been employed as an effective tool in improving the efficiency and stability of PSCs. [8][9][10] Especially in inverted (p-i-n) PSCs, the hole-selective layer (HSL) between the perovskite absorber and indium tin oxide (ITO) anode plays a crucial role in influencing the device performance.…”

Section: Doi: 101002/adma202304415mentioning

confidence: 99%

Compact Hole‐Selective Self‐Assembled Monolayers Enabled by Disassembling Micelles in Solution for Efficient Perovskite Solar Cells

Liu,

Bi,

Jiang

et al. 2023

Advanced Materials

Self Cite

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Self‐assembled monolayers (SAMs) have been widely employed as effective hole‐selective layers (HSLs) in inverted perovskite solar cells (PSCs). However, most SAM molecules are amphiphilic in nature and tend to form micelles in the commonly used alcoholic processing solvents. This introduces an extra energetic barrier to disassemble the micelles during the binding of SAM molecules on the substrate surface, limiting the formation of a compact SAM. To alleviate this problem for achieving optimal SAM growth, we develop a co‐solvent strategy to disassemble the micelles of carbazole‐based SAM molecules in the processing solution. This effectively increases the critical micelle concentration to be above the processing concentration and enhances the reactivity of the phosphonic acid anchoring group to allow densely packed SAMs to be formed on ITO. Consequently, the PSCs derived from using MeO‐2PACz, 2PACz, and CbzNaph SAM HSLs showed universally improved performance, with the CbzNaph SAM derived device achieving a champion efficiency of 24.98% and improved stability.This article is protected by copyright. All rights reserved

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“…This analysis allowed us to identify six distinct stages in the PL signal evolution as shown in Figure S4. 22,23 In stage I, a significant reduction in the PL intensity was observed. This PL quenching phenomenon can be attributed to the progressive increase in Urbach energy, resulting from the formation of grain boundaries triggered by nucleation upon the evaporation of residual solvent.…”

Section: ■ Resultsmentioning

confidence: 96%

Comprehending Perovskite Film Formation Dynamics in Moist Conditions and Their Influence on Photovoltaic Device Performance

Xu,

Bian,

Ran

et al. 2023

J. Phys. Chem. C

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Hydrogen-bond-bridged intermediate for perovskite solar cells with enhanced efficiency and stability

Cited by 121 publications

References 48 publications

Bimolecularly passivated interface enables efficient and stable inverted perovskite solar cells

Bimolecularly passivated interface enables efficient and stable inverted perovskite solar cells

Compact Hole‐Selective Self‐Assembled Monolayers Enabled by Disassembling Micelles in Solution for Efficient Perovskite Solar Cells

Comprehending Perovskite Film Formation Dynamics in Moist Conditions and Their Influence on Photovoltaic Device Performance

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