Hydrogen bonding drives the self-assembling of carbazole-based hole-transport material for enhanced efficiency and stability of perovskite solar cells

Wang, Cheng; Liu, Maning; Rahman, Sunardi; Pasanen, Hannu; Tian, Jingshu; Li, Jianhui; Deng, Zhifeng; Zhang, Haichang; Vivo, Paola

doi:10.1016/j.nanoen.2022.107604

Cited by 26 publications

(13 citation statements)

References 36 publications

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“…7a). 96 It was noted that 45a exhibited three folds more hole mobility compared to the control 45b (without HB ability). This led to an enhanced PCE (15.1%).…”

Section: Performance Parametersmentioning

confidence: 97%

Non-covalent interactions (NCIs) in π-conjugated functional materials: advances and perspectives

et al. 2023

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“…7a). 96 It was noted that 45a exhibited three folds more hole mobility compared to the control 45b (without HB ability). This led to an enhanced PCE (15.1%).…”

Section: Performance Parametersmentioning

confidence: 97%

Non-covalent interactions (NCIs) in π-conjugated functional materials: advances and perspectives

et al. 2023

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“…Specifically, defects in perovskite layers hamper the charge transport and extraction processes, causing interfacial recombination losses between the light-absorbing layer and adjacent charge transport layers and/or electrodes [ 17 , 18 , 19 , 20 ]. Due to these losses, much work remains for further improvements of the optoelectronic device performance and stability over conventional silicon-based devices [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient and Stable Self-Powered Perovskite Photodiode by Cathode-Side Interfacial Passivation with Poly(Methyl Methacrylate)

et al. 2023

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For several years now, organic–inorganic hybrid perovskite materials have shown remarkable progress in the field of opto-electronic devices. Herein, we introduce a cathode-side passivation layer of poly(methyl methacrylate) (PMMA) for a highly efficient and stable self-powered CH3NH3PbI3 perovskite-based photodiode. For effective noise–current suppression, the PMMA passivation layer was employed between a light-absorbing layer of CH3NH3PbI3 (MAPbI3) perovskite and an electron transport layer of [6,6]-phenyl-C61-butyric acid methyl ester. Due to its passivation effect on defects in perovskite film, the PMMA passivation layer can effectively suppress interface recombination and reduce the leakage/noise current. Without external bias, the MAPbI3 photodiode with the PMMA layer demonstrated a significantly high specific detectivity value (~1.07 × 1012 Jones) compared to that of a conventional MAPbI3 photodiode without a PMMA layer. Along with the enhanced specific detectivity, a wide linear dynamic response (~127 dB) with rapid rise (~50 μs) and decay (~17 μs) response times was obtained. Furthermore, highly durable dynamic responses of the PMMA-passivated MAPbI3 photodiode were observed even after a long storage time of 500 h. The results achieved with the cathode-side PMMA-passivated perovskite photodiodes represent a new means by which to realize highly sensitive and stable self-powered photodiodes for use in developing novel opto-electronic devices.

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“…The community has so far mostly focused on new HTM designs as stand-alone layers in PSCs, i.e., targeting molecules with high intrinsic mobility and conductivity (thus being potentially good dopant-free layers) and appropriate energy-level alignment to maximize charge extraction and reduce open-circuit voltage ( V OC ) losses . Only recently, the idea of tailoring specific chemical interactions between the perovskite and the HTM has been exploited, with designs that combine the HTM function with the formation of compact and ordered interfaces with the perovskite, in turn significantly boosting the PSC stability. − However, the identification of a competitive alternative to the traditional Spiro-OMeTAD HTM that would enable remarkable long-term stability of PSCs in ambient conditions, while at the same time guaranteeing simple synthetic protocols and low material consumption, is still a hot topic and requires further attention. − Only an in-depth rationalization of the complex phenomena occurring at the perovskite|HTM interface could provide new criteria in designing HTMs for efficient and, more importantly, stable PSCs.…”

Section: Introductionmentioning

confidence: 99%

“…NMR spectra were recorded on a Bruker AVANCE DPX 300 MHz instrument, while electrospray ionizationmass spectrometry (ESI-MS) spectra were obtained using an AB SCIEX Triple Quad 5500 instrument. Further details on the synthesis of the proposed HTMs (SCF1 and SCF2) are reported in the Supporting Information , along with 1 H and13 C NMR spectra (Figures S1−S4), ESI-MS study (FiguresS5 and S6), and a cost analysis of the materials. Spectroscopic and Thermal Characterization.…”

mentioning

confidence: 99%

Less Is More: Simplified Fluorene-Based Dopant-Free Hole Transport Materials Promote the Long-Term Ambient Stability of Perovskite Solar Cells

et al. 2023

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The stability of perovskite solar cells (PSCs) is greatly affected by the interface between the perovskite active layer and the hole transport material (HTM). The rational design of HTMs with effective anchoring to the perovskite surface is an emerging elegant strategy to promote compact and ordered interfaces that lead to highly efficient and stable PSCs. Herein, we propose two fluorene-based HTM molecular architectures (SCF1 and SCF2) derived from the popular yet expensive Spiro-OMeTAD. Their employment as dopant-free HTMs in standard triple-cation CsFAMA PSCs leads to superior device stability, with a T 80 lifetime well above 1 year (431 days). Our combined theoretical and experimental study of the CsFAMA|HTM interface reveals that the improved adhesion of the SCF-HTMs to the perovskite layer is the key to minimize the non-radiative recombination, reduce the hole trap density, and enhance the long-term stability of the corresponding devices. The simplified structures of SCF1 and SCF2, obtained by removing the orthogonal fragment of the Spiro-OMeTAD scaffold, show a lower molecular distortion than Spiro-OMeTAD, thus promoting a favorable electronic interaction between the SCF-HTMs and the perovskite. This study provides useful design criteria for achieving highly stable PSCs including dopant-free HTMs with optimized adhesion to the perovskite surface.

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Hydrogen bonding drives the self-assembling of carbazole-based hole-transport material for enhanced efficiency and stability of perovskite solar cells

Cited by 26 publications

References 36 publications

Non-covalent interactions (NCIs) in π-conjugated functional materials: advances and perspectives

Non-covalent interactions (NCIs) in π-conjugated functional materials: advances and perspectives

Highly Efficient and Stable Self-Powered Perovskite Photodiode by Cathode-Side Interfacial Passivation with Poly(Methyl Methacrylate)

Less Is More: Simplified Fluorene-Based Dopant-Free Hole Transport Materials Promote the Long-Term Ambient Stability of Perovskite Solar Cells

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