Nano Energy
·
2016
·
IF 11.553
Lin Fan,Yi Ding,Biao Shi,Changchun Wei,Dekun Zhang,Jiangsheng Xie,Xuegong Yu,Baojie Yan,Ying Zhao,Xiaodan Zhang
A thin PC 61 BM buffer layer (BL) has been introduced between TiO 2 electron transporting layer and perovskite absorber in n-i-p planar perovskite solar cells (PSCs). We have found that the elastic nature of the PC 61 BM BL promotes the formation of porous PbI 2−x Cl x thin film with loose structure, which is vital in the following formation of high quality, uniform perovskite films with large grain size. In addition, it has been demonstrated that the thin PC 61 BM BL also flattens the TiO 2 surface, passivates the defects or dangling bands parasitizing on the TiO 2 surface, and optimizes the device band alignment. As a result, the device efficiency has been enhanced dramatically from ~8.37% to 15.44%. Moreover, devices show a good stability over 400 h and reproducibility in 20 pieces fabricated with the same procedure, which implies that this finding is benefit for fabricating highly efficient PSCs. We introduced a thin PC 61 BM buffer layer between the TiO 2 electron transport layer and the perovskite absorber in n-i-p planar perovskite solar cells , which facilitates the construction of a porous PbI 2−x Cl x precursor film, and thus promotes the following realization of high quality, uniform perovskite films with large grain size and improves the solar cell efficiency significantly.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
DOI
高影响因子
ChemNanoMat
·
2022
·Vol. 9
·期 1
·e202200377
·
IF 3.82
Jazib Ali,Yu Li,Jingnan Song,Ming Zhang,Guanqing Zhou,Jinqiu Xu,Lei Zhu,Ahmad Hussain,Firoz Khan,Feng Liu
Graphical Introducing fullerene (PC 61 B) into a non-fullerene (CO i 8DFIC) acceptor suppresses its high crystallization nature, showed good inter-molecule mixing, reduced intermolecular distances and decent morphology, resulting in excellent charge carrier transport properties and benefits from the order phase of fullerene. This study reports a blend of [6, 6]-phenyl-C61-butyric acid methyl ester (PC 61 BM) and CO i 8DFIC non-fullerene acceptor (NFA) as an electron transport layer (ETL) in perovskite solar cells (PSCs). This mixed small-molecule ETL showed good inter-molecule mixing, reduced intermolecular distances and decent morphology, resulting in excellent charge carrier transport properties. Morever, charge carrier extraction and transport at the perovskite/ETL interface was optimized by reducing surface traps and defects due to the passivation ability of various terminal groups from the CO i 8DFIC molecule. A high power conversion efficiency (PCE) of 19.12 % was achieved by taking advantage of benefits from both molecules, showing much better performance than the invidual PC 61 BM or CO i 8DFIC (7.13% for using the NFA only). Moreover, the storage and ambient stabilities of the mixed ETL-based PSCs increased dramatically compared to control devices.
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
DOI
高影响因子
MATERIALS LETTERS
·
2022
·
IF 3.574
Pujia Cheng,Dongping Zheng,Yingjie Zhang,Xinqi Chen,Tianjun Chen,Tiansheng Zhang,Fan Wu
An inorganic–organic hybrid bulk heterojunction (BHJ) consisting of a CuO nanocone array (NCA)/methyl [6,6]-phenyl-C61-butyrate (PC 61 BM) was fabricated on a fluorine-doped tin oxide substrate using a hydrothermal method. Scanning electron microscopy showed that the CuO-NCA/PC 61 BM BHJ hybrid structure was well-formed and that the PC 61 BM compactly filled the interspaces between the CuO nanocones. A FTO/CuO-NCA/PC 61 BM/LiF/Ag hybrid BHJ photodiode had a favorable type-II band alignment for charge separation, and this photodiode showed a nearly 10-fold enhanced photocurrent response compared with a FTO/CuO-NCA/LiF/Ag Schottky junction photodiode. Photoelectrochemical impedance spectroscopy and transient absorption spectroscopy demonstrated that the FTO/CuO-NCA/PC 61 BM/LiF/Ag BHJ device had better photogenerated charge transfer properties and a longer carrier lifetime compared with the FTO/CuO-NCA/LiF/Ag device.
研究领域:
材料科学
·
光伏技术
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Siyuan Weng,Man Zhao,Dayong Jiang
One of the most interesting structures of organic photodetectors (OPDs) is the bulk heterojunction (BHJ), which can be achieved by mixing electron donors and electron acceptors in a suitable solvent and then spin-coating. BHJs have proven to be a very useful method to overcome the short diffusion length of organic semiconductor excitons. However, this structure enhances disorder and hinders the collection of photogenerated carriers. Therefore, it is very important to prepare OPDs with this structure. In this paper, we show how to use conjugate polymer donor poly(3-hexylthiophene) (P3HT) and fullerene derivative acceptor 6,6-phenyl C61-butyric acid methyl ester (PC61BM) to form a binary BHJ active layer by spin-coating to improve the performance and detector wavelength of a ZnO ultraviolet (UV) photodetector (PD). Compared with the ZnO UV PD, the responsivity of the OPD can reach 0.58 A W–1, which is increased by about 7.14 times. Furthermore, the OPD shows improved absorption, high photocurrent to dark current ratio (1.63 × 104), and excellent detection capability (3.67 × 1012 Jones). The preparation of a new OPD by this work shows strong performance and provides a new idea for the research of OPD. Therefore, it is very important to design and manufacture ZnO UV PD to form a BHJ OPD with organic polymers P3HT:PC61BM.
研究领域:
材料科学
·
光电探测器研究
✓ 已验证
DOI
高影响因子
SYNTHETIC METALS
·
2018
·
IF 2.526
Yingqiang Li,Xin Qi,Weiping Wang,Chao Gao,Ning Zhu,Ganghong Liu,Yuqing Zhang,Fang Lv,Bo Qu
A small molecule 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone)-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3- d :2′,3′- d ′]- s -indaceno[1,2- b :5,6- b ′]-dithiophene (ITIC) was used as the additive for the electron transport layer (ETL) of phenyl-C61-butyric acid methyl ester (PC 61 BM) in planar inverted perovskite solar cells (PSCs) fabricated by the flash method. Due to the proper LUMO level and decent electrical conductivity of ITIC, the photovoltaic properties of planar inverted PSCs based on the smooth PC 61 BM:ITIC (2 wt%) ETL were promoted, and the power conversion efficiency (PCE) and the short-circuit current density (J sc ) of the devices were increased to 12.41% and 18.53 mA cm −2 , respectively, which were 13.3% and 13.5% enhancements relative to those of the undoped control devices. Therefore, ITIC was a promising additive for PC 61 BM ETL in inverted PSCs and the photovoltaic properties of devices could be improved accordingly.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Siyuan Weng,Man Zhao,Dayong Jiang
Compared with the electron donor of the bulk heterojunction (BHJ) organic/inorganic photodetectors (OPDs), there is less development in the field of electron acceptors that have strong absorption capacity in the visible light and near-infrared (NIR) region, which hinders the further research and development of OPDs. As a traditional acceptor, fullerene has limited electronic tunability and weak visible light absorption, which limits the optical absorption and electron tunability properties required by the donor. In this work, a novel low-band-gap nonfullerene acceptor (NFA) sodium indocyanine green (Ir-125) is introduced, blended with a fullerene derivative acceptor [6,6]-phenyl C61-butyric acid methyl ester (PC61BM) and a conjugate polymer donor poly(3-hexylthiophene) (P3HT), to form ternary BHJ-active layers, forming a high-performance BHJ OPD with ultrawide spectral response from the ultraviolet (200 nm) to visible light to NIR (1050 nm) region. Here, the high-performance OPD exhibits complementary absorption on the scale of exciton diffusion length and is uniformly mixed with the pure phases. The OPD has high external quantum efficiency (132%) and high detectivity (9.07 × 1012 Jones), which is much higher than those of P3HT:PC61BM, which are 58% and 3.62 × 1012 Jones, respectively, and also, OPDs show an increase in the photocurrent to dark current ratio (Iphoto/Idark) by one order of magnitude. The generation of the balanced photocurrent between the donor and NFA eliminates the undesirable limitation on the donor imposed by fullerene derivatives and expand the response range of the BHJ OPD, which opens up a new avenue toward a higher efficiency and wider response range for the OPDs.
研究领域:
材料科学
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光电技术
·
有机电子学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 31
·18626-18633
·
IF 10.733
Lisha Xie,Jianwei Wang,Kejun Liao,Jin-an Yang,Aili Wang,Xiaoyu Deng,Chengbo Li,Tingshuai Li,Xiaobin Niu,Feng Hao
Most of the electron transport layers (ETLs) used in inverted perovskite solar cells (PSCs) are fullerene derivatives, which are relatively expensive due to the complex synthesis process. Here we report coenzyme Q10, composed of quinone as the acceptor group and an alkyl chain as the donor group, which can be used as a low cost ETL alternative in inverted PSCs. The energy level alignments, carrier transport and recombination dynamics were systematically studied in comparison with the benchmark PC61BM. By optimizing the device structure and thickness of the ETL, the device with Q10 exhibits a comparable power conversion efficiency to the PC61BM device under the standard irradiation conditions. The carrier transport and recombination processes were further evaluated through steady state and time-resolved photoluminescence spectroscopy, space-charge-limited current, and Mott–Schottky measurements. An accelerated carrier injection ability and a passivated interface defect density between the perovskite and Q10 ETL were observed. Charge density difference from DFT calculations also determined that the band alignment of Q10 promoted easier charge transport from the perovskite. Moreover, the long alkyl chain of the Q10 molecule endows it with excellent hydrophobic properties, which largely improves the water-resistance capability of the Q10 ETL. This work highlights the great potential of Q10 as a cheap alternative for the most popular PC61BM ETL for inverted PSCs.
研究领域:
光伏技术
·
材料科学
·
纳米技术
·
能量转换
·
固体物理
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2019
·Vol. 31
·期 16
·1900763
·
IF 25.809
Yuanhong Gao,Ya Yi,Xinwei Wang,Hong Meng,Dangyuan Lei,Xue-Feng Yu,Paul K. Chu,Jia Li
The interfacial charge effect is crucial for high-sensitivity organic phototransistors (OPTs), but conventional layered and hybrid OPTs have a trade-off in balancing the separation, transport, and recombination of photogenerated charges, consequently impacting the device performance. Herein, a novel hybrid-layered phototransistor (HL-OPT) is reported with significantly improved photodetection performance, which takes advantages of both the charge-trapping effect (CTE) and efficient carrier transport. The HL-OPT consisting of 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT) as conduction channel, C8-BTBT:[6,6]-phenyl-C 61 -butyric acid methyl ester (PC 61 BM) bulk heterojunction as photoactive layer, and sandwiched MoO 3 interlayer as a charge-transport interlayer exhibits outstanding photodetection characteristics such as a photosensitivity ( I light / I dark ) of 2.9 × 10 6 , photoresponsivity ( R ) of 8.6 × 10 3 A W −1 , detectivity ( D* ) of 3.4 × 10 14 Jones, and external quantum efficiency of 3 × 10 6 % under weak light illumination of 32 µW cm −2 . The mechanism and strategy described here provide new insights into the design and optimization of high-performance OPTs spanning the ultraviolet and near infrared (NIR) range as well as fundamental issues pertaining to the electronic and photonic properties of the devices.
研究领域:
光电子学
·
有机电子学
·
光电探测器
·
材料科学
·
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）