Efficient and stable Ruddlesden–Popper perovskite solar cell with tailored interlayer molecular interaction

Ren, Hui; Yu, Shidong; Chao, Lingfeng; Xia, Yingdong; Sun, Yuanhui; Zuo, Shouwei; Li, Fan; Niu, Tingting; Yang, Yingguo; Ju, Huanxin; Li, Bixin; Du, Haiyan; Gao, Xingyu; Zhang, Jing; Wang, Jianpu; Zhang, Lijun; Chen, Yonghua; Huang, Wei

doi:10.1038/s41566-019-0572-6

Cited by 500 publications

(424 citation statements)

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“…The recent development in the field of organic-inorganic hybrid halide perovskite materials for use in solar cells and light-emitting diodes has evoked widespread interest in various applications within both the scientific and industrial communities, due to their excellent optoelectronic properties and simple scalable processability. [1][2][3][4][5] However, perovskitebased thin-film transistors (TFTs) have drawn less research attention, despite the high intrinsic charge carrier mobility. [6][7][8] This is mainly due to the difficulty in obtaining a reliable transistor operation with spin-coated perovskite films as a result of ion migration under bias, poor ambient stability of the material, and bulk and interfacial defects.…”

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confidence: 99%

High‐Performance and Reliable Lead‐Free Layered‐Perovskite Transistors

et al. 2020

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Perovskites have been intensively investigated for their use in solar cells and light‐emitting diodes. However, research on their applications in thin‐film transistors (TFTs) has drawn less attention despite their high intrinsic charge carrier mobility. In this study, the universal approaches for high‐performance and reliable p‐channel lead‐free phenethylammonium tin iodide TFTs are reported. These include self‐passivation for grain boundary by excess phenethylammonium iodide, grain crystallization control by adduct, and iodide vacancy passivation through oxygen treatment. It is found that the grain boundary passivation can increase TFT reproducibility and reliability, and the grain size enlargement can hike the TFT performance, thus, enabling the first perovskite‐based complementary inverter demonstration with n‐channel indium gallium zinc oxide TFTs. The inverter exhibits a high gain over 30 with an excellent noise margin. This work aims to provide widely applicable and repeatable methods to make the gate more open for intensive efforts toward high‐performance printed perovskite TFTs.

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confidence: 99%

High‐Performance and Reliable Lead‐Free Layered‐Perovskite Transistors

et al. 2020

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“…[ 11,12 ] As a result, charge transport and extraction are hindered in quasi‐2D PSCs. To date, the highest reported PCEs of quasi‐2D PSCs ( n ≤ 5) remain around 18%, [ 13–15 ] showing considerable performance gaps with regard to 3D‐PSCs.…”

Section: Figurementioning

confidence: 99%

“…By using a new bulky organic ligand 2‐(methylthio)ethylamine hydrochloride (MTEACl), Huang and co‐workers reported quasi‐2D (MTEA) 2 MA 4 Pb 5 I 16 PSCs with the PCE of 18.06% and J sc of 21.77 mA cm −2 . [ 15 ] The obtained J sc , while is among the top values based on low n ‐value quasi‐2D PSCs ( n ≤ 5), still lags behind that of 3D PSCs (e.g., values exceeding 24 mA cm −2 have been realized [ 16,17 ] ). Since the issue of low J sc is primarily associated with the poor charge transport in quasi‐2D perovskites, [ 18–20 ] the development of rationally controlling quasi‐2D perovskite growth with better‐aligned phase distribution and preferred crystal orientation holds great promise to overcome this issue.…”

Section: Figurementioning

confidence: 99%

Water‐Assisted Crystal Growth in Quasi‐2D Perovskites with Enhanced Charge Transport and Photovoltaic Performance

Wang

et al. 2020

Advanced Energy Materials

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Perovskite solar cells (PSCs) employing 3D organic-inorganic hybrid perovskite photoabsorbers have received tremendous progress with state-of-the-art power conversion efficiency (PCE) exceeding 25% during the last a dozen years. [1] However, ambient instability of 3D perovskite materials remains a critical obstacle for realistic applications of PSCs. [2,3] A strategy in addressing the poor stability is to reduce the structural dimensionality of perovskites via the introduction of long-chain organic ligands by forming Ruddlesden-Popper (RP) quasi-2D perovskites. [4,5] The organic ligands are bound to the 3D inorganic framework via coulombic interactions, resulting in a layered structure. The general formula of RP-2D perovskites takes the form of (L) 2 A n−1 Pb n I 3n+1 (n = 1, 2, 3, 4…) where A is the methylammonium (MA +), formamidinium (FA +), or cesium (Cs +) cations, L is the bulky organic ligands, e.g., butylammonium (BA +) or 2-phenylethylammonium (PEA +), and n is the number of layers in the [PbI 6 ] 4− octahedral sheets. [4-7] The incorporation of hydrophobic bulky organic ligands can not only enhance the stability of perovskites with minimized permeation of water molecules but also increase the formation energy of perovskites to mitigate thermal degradation and ion migration. [8-10] These merits alongside the quantum confinement have rendered quasi-2D perovskites great potentials for optoelectronic applications with a wide tunability on the bandgap or photophysical properties. [7] Unfavorably, quasi-2D perovskites are generally associated with a large exciton binding energy (hundreds of meV) due to the insulating nature of bulky organic ligands and the specific layered arrangement. [11,12] As a result, charge transport and extraction are hindered in quasi-2D PSCs. To date, the highest reported PCEs of quasi-2D PSCs (n ≤ 5) remain around 18%, [13-15] showing considerable performance gaps with regard to 3D-PSCs. The PCE (η) of photovoltaic cells is determined by the general relation, J V P FF sc oc light η = × × (V oc is the open-circuit voltage, FF is the fill factor, and P light is the illumination intensity). In quasi-2D PSCs, the relatively low J sc is more restrictive for Organic-inorganic hybrid quasi-2D perovskites have shown excellent stability for perovskite solar cells (PSCs), while the poor charge transport in quasi-2D perovskites significantly undermines their power conversion efficiency (PCE). Here, studies on water-controlled crystal growth of quasi-2D perovskites are presented to achieve high-efficiency solar cells. It is demonstrated that the (BA) 2 MA 4 Pb 5 I 16-based PSCs (n = 5) processed with water-containing precursors display an increased short-circuit current density (J sc) of 19.01 mA cm −2 and PCE over 15%. The enhanced performance is attributed to synergetic growths of the 3D and 2D phase components aided by the formed hydration (MAI•H 2 O), leading to modulations on the crystal orientation and phase distribution of various n-value components, which facilitate interphase charge tr...

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“…1a), where the component A, generally forming the cube unit cell, represents CH 3 NH 3 + (MA), HC(NH 2 ) 2 + (FA) or Cs + cation; the component B, which is located in the centre of the cube unit cell, represents Pb 2+ or Sn 2+ ; and the component X, generally located at surface centres of the cube unit cell of A, represents halogen ions such as Cl À , Br À or I À . 3,4 Depending on the light incidence, PSCs can be broadly divided into either n-i-p or p-i-n architectures, where n-and p-refer to n-type and p-type charge carrier transporting materials, respectively, and i refers to the perovskite optical absorption layer. This definition is also based on the fact whether the electron transporting layer (ETL) or the hole-transporting layer (HTL) is designed to contact with the transparent conductive substrates.…”

Section: Introductionmentioning

confidence: 99%