ACS Applied Materials & Interfaces
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2024
·
IF 8.3
Ke Zhao,QiXu Hu,Jianzhao Cao,Ying Qi,Peng Wei,Yanyan Lu,Jian Cheng,Yahong Xie
Coal-derived carbon nanomaterials possess numerous superior features compared to other classic carbon, such as readily accessible surfaces, tunable pore structure, and facile and precise surface functionalization. Therefore, the controllable preparation of coal-derived carbon nanomaterials is anticipated to be of great significance for the performance improvement and commercialization process of carbon-based perovskite solar cells (C-PSCs). In this study, we successfully synthesized highly stable and commercially valuable graphene oxide (GO) and reduced graphene oxide (rGO) utilizing coal. Compared to traditional methods and commercial graphene, the chemical oxidation and pyrolysis process used in this study is mild and simple, offering the advantages of controlled composition and the absence of other impurities. GO or rGO was incorporated into the top of the SnO2 electron transport layer (ETL) of C-PSCs. Under optimized conditions and ultraviolet-ozone (UVO) irradiation, the ultimate power conversion efficiency (PCE) increased from the unmodified 12.4 to 14.04% (based on rGO) and 15.18% (based on GO), representing improvements of 22 and 31%, respectively. The improved photovoltaic performance is mainly owing to enhanced charge transport capabilities, denser interfacial contacts, improved carrier separation properties, increased conductivity, and abundance of hydrophilic functional groups in GO, which can form more stable hydrogen bonds with SnO2. After being stored at room temperature and ambient humidity for 30 days, the modified, unpacked devices retained 87% of the highest power conversion efficiency (PCE). This study introduces a practical and manageable method to enhance the performance of C-PSCs by using functional carbon nanomaterials derived from coal.
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高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Salman Riaz,Min Liu,Zhenwu Zhong,Hongyu Mi,Weizhi Zheng,Yi Xiao,Ying Qi,Muhammad Salik Qureshi,Shayan Umar,Yahong Xie
Carbon-based perovskite solar cells (C-PSCs) hold significant promise for enhancing the long-term stability and commercial viability of perovskite solar cells (PSCs). However, the power conversion efficiency (PCE) of C-PSCs is limited by excessive charge carrier recombination, which arises from defects within the perovskite material as well as at the interfaces between the perovskite and charge transport layers (CTLs). This study reports a dual-interface modification (DIM) technique aimed at reducing trap-state densities and interstitial defects at the tin dioxide (SnO 2 )/perovskite interface while simultaneously enhancing interfacial quality and crystallinity within the perovskite layer. SnO₂ incorporated with agmatine sulfate (AGTS) as the electron transport layer (ETL) along with benzyl dimethyl hexadecyl ammonium chloride (HDBAC) to passivate the perovskite surface. This dual-interface modification (DIM) of the SnO 2 /perovskite interface has demonstrated a reduction in the number of interstitial defects and trap-state densities, while enhancements within the perovskite layer itself have led to improved crystallinity and notable improvements in light absorption properties. The DIM-modified C-PSCs achieve a PCE of 16.09 %, representing a significant enhancement of 32.10 % compared to a PCE of 12.18 % for the pristine device. Furthermore, the DIM-treated PSC retains 90 % of its initial PCE after 31 days at room temperature and ambient humidity.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Ge Mu,Xiaolong Zheng,Yimei Tan,Yanfei Liu,Qun Hao,Kangkang Weng,Xin Tang
Room-temperature operation or high-operation temperature (HOT) is essential for mid-wave infrared (MWIR) optoelectronics devices providing low-cost and compact systems for numerous applications. Colloidal quantum dots (CQDs) have emerged as a rising candidate to enable photodetectors to operate at HOT or room temperature and develop the next-generation infrared focal plane array (FPA) imagers. Here, band-engineered heterojunctions are demonstrated to suppress dark current with well-passivated mercury telluride (HgTe) CQDs enabling room-temperature MWIR imaging by single-pixel scanning and 640 × 512 FPA sensitive thermal imaging above 250 K. As a result, the room-temperature detectivity reaches as high as 1.26 × 10 10 Jones, and the noise equivalent temperature difference ( NETD ) is as good as 25 mK up to 200 K.
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Science Bulletin
·
2024
·
IF 18.8
Xin Yang,Xu-Dong Wang,Wen-Guang Li,Yu-Hua Huang,Ling-Bin Wang,Jia-Min Liu,Long Jiang,Dai-Bin Kuang
Low-dimensional lead halide materials have proved to be intrinsically stable semiconductor materials. However, the development of one-dimensional (1D) perovskites or perovskitoids with both robust water stability and high optoelectronic performance still faces significant challenges. Here, we report a new class of 1D (TzBIPY)Pb 2 X 6 (X = Cl, Br, I) perovskitoids featuring a π-conjugated diamine cation (TzBIPY = 2,5-di(pyridin-4-yl)thiazolo[5,4-d]thiazole). The TzBIPY 2+ cation with delocalized electrons directly contributes to the electronic structure and hence reduces the band gap. Especially, the Br-based material exhibits enhanced carrier separation and transport capacity, benefiting from the improved electronic conjugation together with a type II intramolecular heterojunction between conjugated organic cations and Pb–X octahedra. The (TzBIPY)Pb 2 Br 6 photodetector exhibits an impressive photocurrent on/off ratio of 8.1 × 10 5 , which is much superior to the previous three-dimensional (3D) perovskite benchmark. Additionally, the π-conjugated cations serve as dense protective shields for vulnerable Pb–X inorganic lattice against being attacked by water, thus demonstrating exceptional stability even immersed in water for over 3000 h.
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Science China-Chemistry
·
2024
·
IF 10.4
Qiang Yue,Cao Huaiman,Pan Yuzhen,Chi Yi,Zhao Liangyu,Yang Yingguo,Li Hai-Bei,Gao Yan,Sun Licheng,Yu Ze
Metal phthalocyanines (MPcs) have gained considerable research attention as hole-transport materials (HTMs) in perovskite solar cells (PSCs) because of their superb stability. However, the photovoltaic performance of MPc-based HTMs in PSCs is still lagging behind their small molecule and polymeric counterparts, largely due to their relatively low hole mobility. Here, we report for the first time the application of a copper naphthalocyanine derivative (namely t Bu-CuNc) as a hole-transport material (HTM) in perovskite solar cells (PSCs), and systematically study its optoelectronic and photovoltaic property compared with its CuPc analog (tBu-CuPc). Combined experiments disclose that the extension of π -conjugation from Pc to Nc core leads to not only an enhanced hole-carrier mobility associated with a stronger intermolecular interaction, but also an elevated glass transition temperature ( T g ) of 252 °C. The resultant PSCs employing t Bu-CuNc deliver an excellent power conversion efficiency of 24.03%, which is the record efficiency reported for metal complex-based HTMs in PSCs. More importantly, the encapsulated t Bu-CuNc-based devices also show dramatically improved thermal stability than the devices using the well-known Spiro-OMeTAD, with a T 80 lifetime for more than 1,000 h under damp-heat stress. This study unfolds a new avenue for developing efficient and stable HTMs in PSCs.
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Bo Chen,He Liu,Jonghee Yang,Mahshid Ahmadi,Qi Chen,Ni Yin,Shitong Zhang,Meiqin Xiao,Haoyue Zhang,Long Xu,Ping Chen
The bandgap and operation stability of metal halide perovskites (MHPs) based light-emitting diodes (PeLEDs) have been compromised by the substantial surface defect densities in the matrix. Today's defect passivation strategies rely on coordination actions of small-molecular and/or polymeric ligands, which effectively enhance the optical properties of materials. However, the non-trivial insulating characteristics of the molecules concurrently sacrifice the operation stability and external quantum efficiency (EQE) of the PeLEDs by augmenting the charge injection barrier at the interface. Herein, a coordinative, charge-polarized organic semiconductor exhibiting thermally activated delayed fluorescence (TADF), namely 9,9-dimethyl-10-(4-(phenyl sulfonyl)phenyl)-9,10-dihydroacridine (SO-DMAc) is coordinated, into the MHPs matrix for deep-red PeLEDs. Owing to the distinctive charge transfer (CT) between the molecule and MHPs with exclusive coordination at the MHP's bottom, SO-DMAc serves as a molecular bridge that significantly augments the hole injection into the PeLEDs. Encouraged by these improvements, efficient and stable deep red PeLEDs offering EQE of 21.8% and respective half lifetimes (T 50 ) of luminance and EQE exceeding 6 and 35 h are demonstrated. It is revealed that the molecular coordination to the MHP surface is pivotal to manifesting the interfacial CT process for favorable energy level tuning.
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Crystals
·
2024
·Vol. 14
·期 9
·802
·
IF 2.4
Tengteng Li,Fupeng Ma,Yafeng Hao,Huijia Wu,Pu Zhu,Ziwei Li,Fengchao Li,Jiangang Yu,Meihong Liu,Cheng Lei,Ting Liang
Sn-Pb perovskite solar cells, which have the advantages of low toxicity and a simple preparation process, have witnessed rapid development in recent years, with the power conversion efficiency for single-junction solar cells exceeding 23%. Nevertheless, the problems of poor crystalline quality of Sn-Pb perovskite films arising from rapid crystallization rate and facile oxidation of Sn2+to Sn4+have become key issues for the further development of Sn-Pb perovskite solar cells. Herein, we report the incorporation of triazinamide (N-(6-methyl-3-oxo-2,5-dihydro-1,2,4-Triazin-4(3H)-YL) acetamide) as an additive to regulate the crystalline growth of Sn-Pb perovskite films, resulting in films with low trap density and large grain size. The triazinamide additive effectively passivated defects in the perovskite films. As a result, the triazinamide-modified perovskite solar cells achieved a higher efficiency of 15.73%, compared with 13.32% for the control device, significantly improving device performance. Notably, the optimal triazinamide-modified perovskite solar cell maintained 72% of its initial power conversion efficiency after being stored in an air environment for nearly 300 h, while only 18% of the power conversion efficiency of the control perovskite solar cell was retained. This study proposes an effective strategy for fabricating highly efficient and stable Sn-Pb perovskite solar cells.
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NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 22
·10273-10283
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IF 2.7
Jing Liao,Ke Yin,Xiaodong Chen,Bichun Huang
The preparation of efficient and cheap adsorbents is important for the removal of chlorinated volatile organic compounds, which are carcinogenic, teratogenic, and mutagenic to human health. In this study, ethylenediamine and ZnCl2 were introduced simultaneously into Camellia oleifera shell-based biochar by the impregnation method. A series of nitrogen doped porous carbons (ANOC-x) were prepared by adjusting the ethylenediamine impregnation ratio combined with NaOH activation. Among them, the chlorobenzene adsorption capacity of ANOC-1.5 reached 1187 mg g−1, which was 1.4 times that of undoped porous carbon. This was attributed to that ANOC-1.5 had the maximum specific surface area (2685 m2 g−1) and a hierarchical porous structure, which provided abundant adsorption sites and mass transfer channels for chlorobenzene adsorption. In addition, the chlorobenzene adsorption performance of porous carbon was highly correlated with surface defects, which was attributed to the fact that the surface of ANOC-1.5 (0.615 at%) contains more pyrrole heterocycles than AOC (0.258 at%), forming more π-electron rich defect sites. These defect sites had strong π–π interactions with chlorobenzene molecules, which could easily bind with the aromatic rings of chlorobenzene, thus improving the adsorption capacity of chlorobenzene. Moreover, ANOC-1.5 had high thermal stability and excellent regeneration performance, and its adsorption capacity for chlorobenzene remained above 90% after five regeneration tests, which exhibited potential for industrial applications.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yujun Liu,Chao Zhou,Fei Wang,Haocheng Li,Quan Cheng,Xinbo Ai,Junsheng Wu,Yonglei Han,Ling Han,Ye Ma,Qi Cao,Yuxuan Feng,Kang Zhou,Jingbai Li,Hanlin Hu,Shiyu Wang,Wang-Ting Lu,Zhuo Zhao,Yongfei Wang,Haoran Lin
The inverted perovskite solar cells based on hole-selective self-assembled molecules (SAMs) have been setting new efficiency benchmarks. However, the agglomeration of SAM and lack of defect passivation ability are two critical issues that need to be addressed. It is demonstrated that by blending co-adsorbent 4-phosphoricbutyl ammonium iodide (4PBAI) with 4-(7H-dibenzo[c,g]carbazole-7-yl) phosphonic acid (4PADCB), enhanced homogeneity, conductivity, and better energy levels can be realized for the co-SAM hole-selective contact. The ammonium functional group on 4PBAI also can effectively passivate the defects at the buried interface and template high-quality perovskite growth. Assisted by synergistic top interface modification, the power conversion efficiency of the optimized device reaches 24.96%, which can retain 95% of the initial after 1200 h in ambient for the unencapsulated device. The findings suggest that a well-designed co-adsorbent can effectively address the limitations and further enhance the performance of cutting-edge SAMs.
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ACS Nano
·
2024
·
IF 15.8
Qiaopeng Cui,Dingshuo Zhang,Yun Gao,Chao Fan,Qiuting Cai,Hongjin Li,Xiaohui Wu,Meiyi Zhu,Junjie Si,Xingliang Dai,Haiping He,Zhizhen Ye
Controlling interfacial reactions is critical for zinc oxide (ZnO)-based inverted perovskite light-emitting diodes (PeLEDs), boosting the external quantum efficiency (EQE) of the near-infrared device to above 20%. However, violent interfacial reactions between the bromine-based perovskites and ZnO-based films severely limit the performance of inverted green PeLEDs, whose efficiency and stability lag far behind those of their near-infrared counterparts. Here, a controllable interfacial amidation between the bromine-based perovskites and magnesium-doped ZnO (ZnMgO) film utilizing caprylyl sulfobetaine (SFB) is realized. The SFB molecules strongly interact with formamidinium bromide, decelerating the amidation reaction between formamidinium and carboxylate groups on the ZnMgO film, thus regulating the crystallization of FAPbBr3. Combined with the passivation of benzylamine, a FAPbBr3 bulk film directly deposited on a ZnMgO substrate with single-crystal characteristics is obtained, exhibiting a high photoluminescence quantum yield of above 80%. The resultant PeLEDs demonstrate a peak EQE of exceeding 20% at a high luminance of 120,000 cd m–2 and a half lifetime of 26 min at 11,000 cd m–2, representing the state-of-the-art inverted green electroluminescence. This work resolves the crucial issues of violent interfacial reactions and provides a strategy toward inverted green PeLEDs with outstanding performance.
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Nano Energy
·
2017
·
IF 12.343
Zhengrui Yang,Jiangsheng Xie,V. Arivazhagan,Ke Xiao,Yaping Qiang,Kun Huang,Ming Hu,Can Cui,Xuegong Yu,Deren Yang
Organic-inorganic hybrid perovskite solar cells (PSCs) have triggered a great deal of research on organic electron transport layers, such as phenyl C 61 butyric acid methyl ester (PCBM), due to their potential application as a strong contender in photovoltaic industry with simple fabrication process and low cost. However, the low electrical conductivity and electron mobility of PCBM hinder the promotion of PSCs. Here we report a successful case of graphene quantum dots (GQDs) doping into PCBM electron transport layer (ETL) of planar N-I-P PSCs, resulting in an obvious increase in PCBM conductivity together with the enhanced charge extraction and reduced the trap state density of perovskite films. A low doping ratio (0.5 wt%) would be efficient to boost the V oc , J sc and FF, a PCE of 17.56% is achieved. More importantly, the light stability of PSCs with PCBM: GQDs was improved: the unpackaged cells can keep > 80% of the initial PCE under simulated sunlight with the full UV component present after 300 h, in contrast to the reference device that dropped < 50% during the same period of time.
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ADVANCED MATERIALS
·
2024
·
IF 27.4
Wenshu Yang,Kai Zhang,Wei Yuan,Lijun Zhang,Chuanjiang Qin,Haibo Wang
Ion migration poses a substantial challenge in perovskite transistors, exerting detrimental effects on hysteresis and operational stability. This study focuses on elucidating the influence of ion migration on the performance of tin-based perovskite field-effect transistors (FETs). It is revealed that the high background carrier density in FASnI 3 FETs arises not only from the oxidation of Sn 2+ but also from the migration of FA + ions. The formation of hydrogen bonding between FA + and F − ions efficiently inhibits ion migration, leading to a reduction in background carrier density and an improvement in the operational stability of the transistors. The strategy of hydrogen bond is extended to fluorine-substituted additives to improve device performance. The incorporation of 4-fluorophenethylammonium iodide additives into FETs significantly minimizes the shift of turn-on voltage during cyclic measurements. Notably, an effective mobility of up to 30 cm 2 V −1 s −1 with an I on/off ratio of 10 7 is achieved. These findings hold promising potential for advancing tin-based perovskite technology in the field of electronics.
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