JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Yaping Zhang,Yanan Wang,Jing Chen,Lin Peng,Xiaolin Liu,Jia Lin
Inorganic CsPbI 2 Br perovskite solar cells (PSCs) have attracted enormous interest due to their excellent thermal stability and immense potential for application in tandem solar cells. However, the rambunctious crystallization and poor film quality of inorganic CsPbI 2 Br perovskite are the main factors limiting their performance improvement. Herein, dibenzoylmethane (DBM), containing electron-rich and dual C O functional groups, as an efficient precursor additive, is first introduced to regulate the crystallization of CsPbI 2 Br perovskite while passivating its associated defects. After DBM modification, nucleation is accelerated and the crystallinity of CsPbI 2 Br film is improved, thus promoting the phase stability. Additionally, DBM can passivate uncoordinated Pb 2+ defects, thereby significantly reducing non-radiative recombination, and can also decrease the energy level difference between CsPbI 2 Br/Carbon. As a result, when DBM additive is incorporated in the CsPbI 2 Br, the power conversion efficiency (PCE) of the device with the fluorine doped tin oxide glass (FTO)/SnO 2 /CsPbI 2 Br/Carbon structure is significantly improved to 13.46 %, an increase of nearly 13 % compared to the control device (11.72 %). The unpackaged devices exhibit excellent air and thermal stability, still remaining over 90 % of its initial PCE after aging for 500 h under ambient conditions, or continuous heating at 65 °C in glovebox for 500 h, respectively.
研究领域:
材料科学
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能源技术
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光伏器件
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Haibo Ye,Zhiyong Liu,Xingyue Liu,Bo Sun,Xianhua Tan,Yuxue Tu,Tielin Shi,Zirong Tang,Guanglan Liao
Organic-inorganic lead halide perovskite solar cells have garnered enormous interest in scientific communities due to comparable power conversion efficiencies and solution-processed fabrication techniques. Among them, carbon-based perovskite solar cells seem to be one of the most promising candidates for addressing the stability issue while suffering from inferior efficiency or high processing temperature. Herein, we introduce low-temperature processed Zn-doped SnO 2 (below 200 °C) as an effective electron transport layer in perovskite solar cells for the first time, and demonstrate a low-temperature carbon-based device with Cu-phthalocyanine as hole transport layer. We find that Zn doping contributes to a more suitable energy level alignment and an improved conductivity for SnO 2 films. As a result, the electron transfer and extraction are enhanced and the charge recombination is suppressed. In addition, devices with Zn-doped SnO 2 have a wider depletion region, leading to an enhanced photovoltaic performance . An optimal efficiency of 17.78% can be obtained after 2 mM Zn doping. Furthermore, these devices, introducing highly stable and hydrophobic Cu-phthalocyanine and carbon, maintain almost 100% of their initial efficiencies over 1200 h in ambient air. Our study paves the way for developing highly efficient and flexible carbon-based perovskite solar cells.
研究领域:
材料科学
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能源技术
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光电转换
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
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2022
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IF 5.532
Lei Chen,Yanwen Jing,Zhimin Xu,Mengyao Shao,Shengyan Ge,Xingfu Zhou
The introduction of up-conversion materials converting near infrared light into useable visible light has been proven to be a promising strategy for improving the performance of perovskite solar cells . In this work, the up-conversion material of NaYF 4 :Yb 3+ , Er 3+ nanoparticles (NPs) were successfully prepared by one-step hydrothermal route and incorporated into Al 2 O 3 as the scaffold layer for the air-processed carbon-based mesoscopic perovskite solar cells (MPSCs). FESEM shows that the size of NaYF 4 :Yb 3+ , Er 3+ nanoparticles is about 100 nm and there is no obvious agglomeration. The UV–vis–NIR absorption spectrum of the mixed scaffold layer demonstrates a distinct infrared light response. The infrared photoelectric efficiency and EQE tests were used to verify that NaYF 4 :Yb 3+ , Er 3+ nanoparticles improved the photo response of the device in the infrared region, thereby improved the photoelectric performance of the MPSCs. An optimal efficiency of 13.04% was obtained by incorporating 25 wt% NaYF 4 :Yb 3+ , Er 3+ nanoparticles into the Al 2 O 3 scaffold layer, which shows a 20.6% increase in conversion efficiency when compared with the device without using the up-conversion material (10.81%). The optimized carbon-based MPSCs also show an infrared responded PCE value of 0.11% under infrared irradiation from 800 to 1100 nm. This paper shows that the up-conversion material expands the light response of solar cells to the infrared region and provides an effective method for the preparation of high-efficiency perovskite solar cells.
研究领域:
材料科学
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能源技术
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纳米科技
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Bingjie Xu,Dongmei Liu,Chen Dong,Muhammad Awais,Wanlong Wang,Yuhao Song,Yingying Deng,Miaosen Yao,Junjie Tong,Gentian Yue,Weifeng Zhang,Furui Tan,Makhsud I. Saidaminov
Carbon-based all-inorganic perovskite solar cells (C-IPSCs) are stable, upscalable and have low CO 2 -footprint to fabricate. However, they are inefficient in converting light to electricity due to poor hole extraction at perovskite/carbon interface. Here we enable an efficient hole extraction in C-IPSCs with the aid of inorganic p-type nickel oxide nanoparticles (NiO x -NPs) at the interface and in carbon. By tailoring the work function (WF) of carbon, and reducing the energy-level misalignment at the perovskite/carbon interface, NiO x -NPs enable efficient hole transfer, reduce charge recombination and minimize energy loss. As a result, we report 15.01% and 11.02% efficiencies for CsPbI 2 Br and CsPbIBr 2 C-IPSCs, respectively, with a high open-circuit voltage of ∼1.3 V. Unencapsulated interface-modified CsPbI 2 Br devices maintained 92.8% of their initial efficiency at ambient conditions after nearly 2,000 h; and 94.6% after heating at 60 °C for 170 h. This strategy to tailor carbon interface with perovskite offers an important knob in improving C-IPSCs performance.
研究领域:
材料科学
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能源技术
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光伏器件
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）