Boost the efficiency of nickel oxide-based formamidinium-cesium perovskite solar cells to 21% by using coumarin 343 dye as defect passivator

Liu, Sanwan; Chen, Rui; Tian, Xueying; Yang, Zhichun; Zhou, Jing; Ren, Fumeng; Zhang, Shasha; Zhang, Yiqiang; Guo, Mengfan; Shen, Yang; Liu, Zonghao; Chen, Wei

doi:10.1016/j.nanoen.2022.106935

Cited by 55 publications

(47 citation statements)

References 56 publications

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“…Here, we chose an intrinsic stable formamidinium-cesium perovskite with the composition of Cs 0.15 FA 0.85 Pb(I 0.95 Br 0.05 ) 3 as the absorbers in our study. [27] Three alkyldiammonium additives, i.e., HDAI 2 , PDAI 2 , and BDAI 2 added to perovskite precursor solutions to investigate their defect passivation effect. It is noted that the interior defects of perovskite can be ignorable compared with surface defects in high-quality perovskite polycrystalline films.…”

Section: Resultsmentioning

confidence: 99%

“…[44] Thus, we could conclude that tDOSs in both regions were reduced with BDAI 2 treatment, which could be attributed to the passivation of acceptor-like defects on the perovskite surface by BDA cation (V FA -shallow-level defect and I Pb -deep-level defect), indicating that BDAI 2 could efficiently passivate the defect states enriched both at the perovskite grain boundaries and surfaces. [27,45] To better understand the device performance improvement, we further analyzed the V OC of devices under different light intensities and plotted as a function of light intensities in logarithm scales (Figure 4e). The slope of V OC versus the natural logarithm of light intensity is related to the ideality factor (n) in the form of nk B T q −1 , which is correlated with the defectassisted non-radiative recombination behavior in PSCs.…”

Section: Resultsmentioning

confidence: 99%

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Effective Passivation with Size‐Matched Alkyldiammonium Iodide for High‐Performance Inverted Perovskite Solar Cells

Liu

Guan

Xiao

et al. 2022

Adv Funct Materials

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Organic ammonium salts have been widely used for defect passivation to suppress nonradiative charge recombination in perovskite solar cells (PSCs). However, they are prone to form undesirable in-plane favored 2D perovskites with poor charge transport capability that hamper device performance. Herein, the defects passivation role of alkyldiammonium including 1.6-hexamethylenediamine dihydriodide (HDAI 2 ), 1,3-propanediamine dihydriodide (PDAI 2 ), and 1.4-butanediamine dihydriodide (BDAI 2 ) for formamidiniumcesium perovskite is systematically investigated. With help of density functional theory (DFT) calculations, BDA with suitable size can synergistically passivate two defect sites on perovskite surfaces, showing the best defect passivation effect among the above three alkyldiammonium salts. Perovskite films based on BDAI 2 modification are found to keep the 3D perovskite phase with considerably reduced trap-state density, and enhanced carrier extraction. As a result, the BDAI 2 -modified devices deliver impressive efficiencies of 23.1% and 20.9% for inverted PSCs on the rigid and flexible substrates, respectively. Moreover, the corresponding encapsulated rigid devices maintain 92% of the initial efficiency after operating under continuous 1-sun illumination with the maximum power point tracking for 1000 h. Furthermore, the mechanical flexibility of the BDAI 2 -modified flexible device is also improved due to the release of residual stress.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Effective Passivation with Size‐Matched Alkyldiammonium Iodide for High‐Performance Inverted Perovskite Solar Cells

Liu

Guan

Xiao

et al. 2022

Adv Funct Materials

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“…The decreased τ 1 and average lifetime indicate that the TeDA treatment enhances the hole extraction of NiO X from the perovskite film. [44,45] Ultraviolet photoelectron spectroscopy (UPS) and XPS measurements were performed to estimate the band alignment of different HTLs (Figure S9, Supporting Information, shows full spectra). As shown in Figure 5a,b, the photoemission cut-off for TeDA-treated NiO X is 16.63 eV, corresponding to a valence band maximum (VBM) of 4.72 eV, while the photoemission cut-off of the bare NiO X is 16.50 eV and the VBM is 4.59 eV.…”

Section: Resultsmentioning

confidence: 99%

“…The decreased τ 1 and average lifetime indicate that the TeDA treatment enhances the hole extraction of NiO X from the perovskite film. [ 44,45 ]…”

Section: Resultsmentioning

confidence: 99%

Impact of Nickel Oxide/Perovskite Interfacial Contact on the Crystallization and Photovoltaic Performance of Perovskite Solar Cells

Liu

Wang

et al. 2022

Solar RRL

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Metal-halide perovskites have attracted much attention for their excellent optoelectronic properties, such as tunable bandgap, long carrier lifetime, low cost, and lowtemperature solution-processibility. In just a few years, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has rapidly increased from 3.8% to more than 25%, [1,2] making them one of the most promising candidates for the nextgeneration low-cost photovoltaic technologies. This rapid progress is largely due to the careful modification of perovskite compositions, delicate design of device configurations, and an in-depth understanding of interfacial interactions, etc. [3][4][5][6] Inverted PSCs (p-i-n structure) have attracted increasing interest from both research and industry in recent years due to their little hysteresis and fatigue phenomena, low materials cost, simple preparation process, and readily scalable for largearea modules fabrication. [7][8][9][10][11] For p-i-n PSCs, the selection of hole transport layers (HTLs) is one of the most crucial steps for obtaining excellent device performance. p-type semiconductors, such as poly(3,4-ethylenedioxythiophene):poly-(styrenesulfonate) (PEDOT:PSS), polytriarylamine (PTAA), or nickel oxide (NiO X ) are commonly used HTLs to extract and transfer holes from the perovskite to the contact electrode. However, PEDOT: PSS has disadvantages in sensitivity to moisture because of its acidity, which potentially leads to the degradation of perovskites. [12] The poor wettability of PTAA makes the perovskite difficult to form dense films, which makes the devices prone to short circuits. [13] In contrast, NiO X is advantageous as an HTL due to its large bandgap (3.5-3.9 eV), deep valence band maximum (5.1-5.4 eV), high mobility (%10 À3 cm 2 V À1 s À1 ), [14][15][16] and intrinsic superior stability of the inorganic nature. In addition, NiO X HTL can be fabricated by a variety of scalable processing routes including chemical vapor deposition, [17] sputtering, [18,19] spray pyrolysis, [20][21][22] electron beam evaporation, [23] and so on. Among them, spray pyrolysis is a method that can fabricate large-area thin films at low cost, which is promising for scaling up PSCs. However, the solar cell performance based on spraycoated NiO X is inferior to the state-of-the-art PSCs, which urges the researchers to find a proper way to improve their performance.

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“…[22] Such information is useful for the quantitative evaluation of electrical parameters of PSCs which have a prominent role in the device performance. [23][24][25][26] For clarity purposes, the present review has been divided into five sections. The capacitive response of a typical PSC has been presented in section 2.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Capacitive Response in Metal Halide Perovskite Solar Cells

Khan

Al‐Ahmed

et al. 2022

The Chemical Record

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The perovskites solar cells (PSCs) is composed of multifaceted device architecture and involve complex charge extraction (both electronic and ionic), this makes the task demanding to unlock the origin of the different physical process that occurs in a PSC. The capacitance in PSCs depends on several external perturbations including frequency, illumination, temperature, applied bias, and importantly on the interface modification of perovskites/charge selective contact. Arguably, different features including interfacial and bulk; ionic, and electronic charge transport in PSCs occur at different time scales. Capacitance spectroscopy is a prevailing technique to unravel the various physical phenomenon that occurs in a PSC at different time scales. A deeper knowledge of the capacitive response of a PSCs is essential to understand the charge carrier kinetics and unlock the device physics. This work highlights the capacitive response of PSCs and its application to unlock the device physics which is essential for the further optimization and improvement of the device performance.

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Boost the efficiency of nickel oxide-based formamidinium-cesium perovskite solar cells to 21% by using coumarin 343 dye as defect passivator

Cited by 55 publications

References 56 publications

Effective Passivation with Size‐Matched Alkyldiammonium Iodide for High‐Performance Inverted Perovskite Solar Cells

Effective Passivation with Size‐Matched Alkyldiammonium Iodide for High‐Performance Inverted Perovskite Solar Cells

Impact of Nickel Oxide/Perovskite Interfacial Contact on the Crystallization and Photovoltaic Performance of Perovskite Solar Cells

Evaluating the Capacitive Response in Metal Halide Perovskite Solar Cells

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