JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Lin Guan,Zhipeng Zheng,Yiping Guo
Spiro-OMeTAD is one of the widely used hole-transfer materials for designing high-performance perovskite solar cells . It is reported that acid doping is an efficient and facile method to increase the conductivity of spiro-OMeTAD and accelerate its oxidation process . Besides, investigating the morphologic controlling mechanism of spiro-OMeTAD films would give a novel insight in designing the hole-transport layer (HTL) and further clarify the mechanism of acid additives. In this work, the effect of benzoic acid on the spiro-OMeTAD oxidation is studied, where the formation of the lithium benzoate phase can decrease the size of hollows in the spiro-OMeTAD film. By doping benzoic acid, the HTL exhibits faster oxidation process and better hole transfer ability. Meanwhile, the hysteresis of the perovskite solar device based on the HTL is effectively reduced via optimizing the doping content, with an improved power conversion efficiency reaching up to 16.26% under standard AM 1.5G illumination.
研究领域:
材料科学
·
太阳能
·
有机电子学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Boyuan Hu,Jian Zhang,Yulin Yang,Jiaqi Wang,Wei Wang,Jiao Li,Shihui Liu,Debin Xia,Kaifeng Lin,Yayu Dong,Ruiqing Fan
Conventional oxidation of 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene (Spiro-OMeTAD) by air would bring various drawbacks for perovskite solar cells (PSCs), such as low power conversion efficiency (PCE) and poor stability. Here, a series of heteroatom-substituted Keggin-type polyoxometalates (POMs), H4PMo11VO40 (PMo11V), H5PMo10V2O40 (PMo10V2), and H6PMo9V3O40 (PMo9V3) are prepared and applied as p-type dopants to realize quantitative and controllable oxidation of Spiro-OMeTAD under an inert condition. The possible mechanism and electron donor regions in the oxidation of Spiro-OMeTAD are investigated using two-dimensional nuclear magnetic resonance (NMR) spectra and the relationship between POM structures and the oxidation degree of Spiro-OMeTAD is proposed. In addition, the synergistic effect of heteroatoms makes V2-substituted PMo10V2 exhibit appropriate oxidation of Spiro-OMeTAD and promoted the highest efficient hole extraction as well as the decreased charge recombination. Therefore, the champion device doped with PMo10V2 shows a PCE of 20.41% and a superior open circuit voltage (Voc) of 1.133 V, surpassing that of the pristine device (18.61%). This work presents a fresh perspective to the controllable oxidation of Spiro-OMeTAD employing economical inorganic POM dopants, which would promote the commercialization of PSCs.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL PHYSICS
·
2023
·Vol. 36
·期 2
·231-231
·
IF 1
Liu Xu-hao,Liu Yang-yang,Zhu Rong-zhi,Liu Lu-jie,Xu Chen-xin,Cao Hui
Metal-halide perovskite solar cells (PSCs) have attracted considerable attention during the past decade. However, due to the existence of non-radiative recombination losses, the best power conversion efficiency (PCE) is still lower than the theoretical limit defined by Shockley-Queser theory. In this work, we investigate 1,2,3-oxathiazin-4(3h)-one, 6-methyl-2,2-dioxide (acesulfame potassium, abbreviated as AK) as a additional dopant for the 2,2′,7,7′-tetrakis( N , N -di-p-methoxyphenyl-amine)-9,9′-spirobifluorene (Spiro-OMeTAD) and fabricate PSCs in the air. It is found that 12 mol% fraction of AK relative to lithium bis((trifluoromethyl)sulfonyl)-amide (Li-TFSI) reduces the non-radiative recombination from 86.05% to 69.23%, resulting in an average 0.08 V of V oc enhancement. The champion solar cell gives a perovskite solar cells up to 21.9% and over 84% retention of the initial value during 720 h aging in dry air with 20%–30% humidity.
研究领域:
材料科学
·
可再生能源
·
光伏技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jianmei Jiang,Yaoming Xiao,Wenjing Yang,Chao Wen,Biye Liu,Lidan Wang,Yunpeng Xu,Xue Zhang,Qixin Zhuang,Jinguo Lin,Zisheng Su,Jeng-Yu Lin
Although the efficiency of perovskite solar cells (PSCs) keeps breaking new records, their stability and cost are still limited by using the conventional hole transport material of 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (Spiro-OMeTAD). Herein, we use 3,4-ethylenedioxythiophene (EDOT) as a solubilizer to enhance the dissolution of lithium bis(trifluoromethane)sulfonylimide (Li-TFSI) and reduce the 4-tert-bultypyridine (TBP) dosage. Then, EDOT undergoes in situ oxidative polymerization to generate PEDOT by an oxidizing agent of iodine (I2). Moreover, I2 can also accelerate the oxidation of Spiro-OMeTAD. Therefore, the generated PEDOT can synergistically enhance hole transport capability with the oxidized Spiro-OMeTAD, and the generated I– ions can compensate for the I vacancies and inhibit the migration of I– in the perovskite film, resulting in an enhanced stability and efficiency of PSCs. A PSC based on the composite hole transport system achieves a power conversion efficiency (PCE) of 24.79%. Moreover, the PSC retains 92% of its initial PCE for over 2000 h under ambient conditions of 25 °C and 35% relative humidity. Furthermore, the quantities of Spiro-OMeTAD and TBP have, respectively, decreased by 24.9 and 37.5% in the composite hole transport system, thereby lowering the production cost of the PSC and facilitating its industrialization development.
研究领域:
材料科学
·
光伏技术
·
高分子化学
·
纳米技术
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Junsheng Luo,Chunyang Jia,Zhongquan Wan,Fei Han,Bowen Zhao,Ruilin Wang
Perovskite solar cells (PSCs) emerging as the most promising next-generation photovoltaic devices have been received great attention. In the PSC device, admittedly, Spiro-OMeTAD is the most widely used hole-transporting material (HTM). However, the pristine Spiro-OMeTAD suffers from low hole mobility and conductivity, which requires chemical dopants (Li-TFSI and tBP) to increase conductivity thereby improving power conversion efficiency (PCE). Discouragingly, hygroscopic Li-TFSI can gravely degrade the perovskite film and diminish the stability of PSC. Meanwhile, tBP also gives rise to the degradation of perovskite film by forming a [PbI 2 ·tBP] coordinated complex or iodopyridinate complex. In this study, F4-TCNQ is introduced into Spiro-OMeTAD as an alternative dopant to replace the commonly used Li-TFSI and tBP. By optimizing the doping concentration of F4-TCNQ, the PSC based on 1.5 mol% F4-TCNQ doped Spiro-OMeTAD exhibits the best PCE as high as 12.93%, which is comparable to that of 14.32% for reference device with Li-TFSI and tBP doped Spiro-OMeTAD. Moreover, the PSC based on F4-TCNQ doped Spiro-OMeTAD shows lower hysteresis and better stability. This work not only offers a promising dopant for Spiro-OMeTAD, but also provides a viable approach to address the challenges of hysteresis and instability.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Junjun Su,Xinyi Zhang,Zixuan Dong,Hongfei Pan,Fei Zhang,Xianggao Li,Shirong Wang,Zhijian Chen
In this study, a series of dopant-free, low-cost hole-transporting materials (HTMs) based on triphenylamine-functionalized azadipyrromethene dyes 1–3 (TPA-ADPs 1–3) were designed and synthesized. The properties of these new HTMs were investigated by optical spectroscopy, cyclic voltammetry, thermogravimetric analysis, differential scanning calorimetric, atomic force microscopy, and X-ray diffraction, as well as theoretical calculations. The results indicated that the TPA-ADPs 1–3 presented well-matched energy levels with perovskite, higher hole mobility, as well as more effective defect passivation at the perovskite/HTM interface by the coordination interaction between the ADP moiety and the undercoordinated Pb2+. The n-i-p perovskite solar cells (PSCs) employing HTMs 1–3 as well as doped Spiro-OMeTAD were fabricated and characterized. The TPA-ADP 1-based PSCs exhibited the best performance with a champion power conversion efficiency (PCE) of 22.13% and an fill factor of 0.81, which was superior to that of the devices based on the doped Spiro-OMeTAD. Long-term device performance studies indicated that the TPA-ADP 1-based PSCs maintained 80% of the initial PCE after 1800 h of storage in the ambient condition of 40–60% RH, which was also higher than the stability of doped Spiro-OMeTAD-based devices under the same conditions.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 10
·2573-2579
·
IF 5.976
Ruiqi Guo,Ting Shen,Jianjun Tian
“Green” narrow band-gap CuInSe2 quantum dots (QDs) were first introduced in photodetectors. Thus, a broadband hybrid photodetector was obtained by combining the ultraviolet detection of spiro-OMeTAD and the near-infrared detection of CuInSe2 QDs. In order to improve the detection of the device, the oil-soluble CuInSe2 QDs were transformed into water-soluble MPA-capped QDs through ligand exchange, which drastically shortened the length of the surface ligand. The specific detectivity (D*) of the photodetector reached 1.6 × 1012 Jones at 330 nm and 7.5 × 1010 Jones at a 1000 nm wavelength. The unencapsulated device also displayed a fast response time (<0.02 s) and excellent thermal stability (20–100 °C) in ambient air. This work could open a window of toxic-free QD based photodetectors to achieve a broadband response.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2025
·
IF 4.6
Maolin He,Zijie Wang,Yong Chen,Yuheng Li,Junjie Wu,Peng Gao
Perovskite solar cells (PSCs) have achieved remarkable power conversion efficiencies (PCEs) exceeding 27 %, yet their long-term operational stability remains a significant barrier to commercialization. The state-of-the-art hole transport layer (HTL) based on Spiro-OMeTAD relies on hygroscopic lithium salts and volatile co-additives to boost conductivity, which inevitably accelerates interfacial degradation. Here, we introduce a molecular co-doping strategy in which a brominated dithieno[3,2-b:2′,3′-d]pyrrole derivative (DTP-OMe-2Br) is incorporated into Spiro-OMeTAD to synergistically combine their advantages. Owing to its planar donor-rich framework and bromine functionalities, DTP-OMe-2Br preferentially localizes at the perovskite/HTL interface, enhancing hole mobility, passivating undercoordinated Pb²⁺ defects, and increasing hydrophobicity without disrupting Spiro’s film-forming properties. As a result, devices achieve a champion PCE of 24.41 %, surpassing the 23.06 % of the pristine Spiro-OMeTAD reference, and retain over 85 % of their initial efficiency after 2500 h in ambient air. This work demonstrates that rationally designed small-molecule additives can serve as multifunctional interfacial modifiers for hybrid HTLs, offering a generalizable route toward high-efficiency and durable PSCs.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jing Xu,Jihuai Wu,Qi Chen,Ying Wang,Ruoshui Li,Xia Chen,Zhang Lan,Weihai Sun
Due to its enormous development potential, research on perovskite solar cells (PSCs) is progressing rapidly worldwide. Among numerous hole transport materials (HTMs), an organic molecule spiro-OMeTAD emerged victorious. Spiro's application in PSCs is constrained to its weak hole mobility and low conductivity. Here, an inexpensive, ecologically friendly inorganic oxidant iodine pentoxide (I 2 O 5 ) is used to aid in quick and manageable oxidation of Spiro. I 2 O 5 -modified Spiro as HTM improves the charge carrier transportation. Meanwhile, trap-states density and trap-assisted recombination are decreased. Additionally, the modification adjusts the HTM's energy level to match the perovskite layer properly. As a result, the I 2 O 5 -modified PSC achieves a champion power conversion efficiency of 22.80%, while the pristine device gets an efficiency of 20.65%.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2022
·
IF 2.719
Hao Zhu,Yanping Mo,Chao Wang,Jing Li,Congcong Tian,Yongtao Wen,Zhipeng Lin,Guomu Yu,Luqi Wang,Peiran Hou,Xiao-Li Zhang,Wei Li,Yi-Bing Cheng,Fuzhi Huang
Regarded as one of the best hole transporting material (HTM) for perovskite solar cells, 2,2′,7,7′-tetrakis-(N,N-di-4-methoxyphenylamino)-9,9′-spirobifluorene (spiro-OMeTAD) has suffered from instability induced by Lithium bis(trifluoromethanesulfonyl)imide (Li-TFSI) hygroscopicity and aggregation. Herein, we replace Li-TFSI with the hydrophobic ionic liquid (IL) 1-Butyl-1-methylpiperidinium bis(trifluoromethyl sulfonyl)imide (BMPIP-TFSI). The BMPIP-TFSI functions as a p -type dopant in the spiro-OMeTAD, increasing the hole mobility, promoting the conductivity and enhancing the moisture-resistance of HTM. The corresponding perovskite solar cells achieve a champion power conversion efficiency exceeding 23%. Furthermore, the un-encapsulated devices show enhanced stability under humid environment, retaining 85% of its initial efficiency after 500 h.
研究领域:
材料科学
·
能源技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2018
·
IF 4.374
Xichuan Yang,Weihan Wang,Yanyun Zhang,Licheng Sun
P-type doping is a rational strategy for the enhancement of hole transporting properties of the organic semiconductors as well as the device performance of organic photo-electric devices. We originally introduce a stable and solution processed p-type dopant based on N-oxoammonium salts termed 2,2,6,6-tetramethyl-1-oxopiperidinebromide salt (TEMPO-Br) for 2,2′,7,7′-tetrakis(N, N-di-p-methoxyphenyl-amine)9,9′-spirobifluorene (Spiro-OMeTAD) based solid state dye sensitized solar cells (ssDSC). By introducing TEMPO-Br doped Spiro-OMeTAD and a commercialized D-π-A sensitizer into ssDSCs, a promising device performance of 6.83% is achieved under simulated AM 1.5G solar irradiation (100 mW cm −2 ), which is significantly better than the control devices (∼1.7 times). The doping effect of TEMPO-Br on the photophysical and electrochemical properties of Spiro-OMeTAD, solid state device performance, cationic dye regeneration kinetics and preliminary long-term stability have been systematically investigated. This work indicates a potential application of N-oxoammonium salts as chemical P-type dopants for triphenylamine based hole transporting materials in solid state photo-electric devices.
研究领域:
材料科学
·
光电化学
✓ 已验证
DOI
高影响因子
Advanced Electronic Materials
·
2018
·Vol. 5
·期 2
·1800683
·
IF 5.466
Weihuang Wang,Xiaomin Wang,Guilin Chen,Liquan Yao,Xiaojuan Huang,Tao Chen,Changfei Zhu,Shuiyuan Chen,Zhigao Huang,Yi Zhang
Antimony sulfide-selenide Sb 2 (S,Se) 3 as a promising absorber material has drawn extensive attention owing to its rewarding photoelectric properties, low toxicity, and earth abundant components. Here, an available and highly effective method, in situ hydrothermal growth accompanied with postselenization, is successfully applied to fabricate Sb 2 (S,Se) 3 solar cells. The rationale for the preparation of Sb 2 S 3 precursors by the hydrothermal method is discussed, and detailed characterization of Sb 2 (S,Se) 3 films selenized with different temperatures is also carried out. Finally, a solar cell with structure of FTO/CdS/Sb 2 (S,Se) 3 /Spiro-OMeTAD/Au is fabricated, which delivers an encouraging 6.14% efficiency with V oc of 732 mV, J sc of 14.6 mA cm −2 , and fill factor of 60.8%. This work provides valuable references for further development and improvement of Sb 2 (S,Se) 3 solar cells.
研究领域:
材料科学
·
太阳能
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）