Outstanding Performance of Hole‐Blocking Layer‐Free Perovskite Solar Cell Using Hierarchically Porous Fluorine‐Doped Tin Oxide Substrate

Yu, Haejun; Lee, Jong Woo; Yun, Juyoung; Lee, Kisu; Ryu, Jaehoon; Lee, Jungsup; Hwang, Doyk; Kim, Seong Keun; Jang, Jyongsik

doi:10.1002/aenm.201700749

Cited by 51 publications

(52 citation statements)

References 63 publications

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“…Up till now, the ETL‐free PSCs still suffered from the unsatisfied device performance owing to the severe charge‐carrier recombination due to the absence of the ETL layer . To overcome such shortage, some effective strategies have been employed, such as tuning the ink composition via additive/doping engineering towards high‐quality perovskite film with improved electric properties (e.g., enhanced conductivities, shifted work function) and better energy level alignment with other interfacial layers, modifying the transparent conducting oxide electrode (e.g., UV‐ozone treatment or electrochemical etching) to construct a favorable interface, which enabled the demonstration of high‐performance ETL‐free PSCs. Apart from aforementioned methodologies either by changing the perovskite compositions or optimizing the electrodes, simply controlling the morphology of perovskite films is also a possible avenue toward high‐performance ETL‐free device structure.…”

Section: Detailed Photovoltaic Parameters (Jsc Voc η and Ff) Of Thmentioning

confidence: 99%

Maze‐Like Halide Perovskite Films for Efficient Electron Transport Layer‐Free Perovskite Solar Cells

Liao

Jiang

et al. 2019

Solar RRL

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Perovskite solar cells (PSCs) without an electron transport layer (ETL) exhibit fascinating advantages such as simplified configuration, low cost, and facile fabrication process. However, the performance of ETL‐free PSCs has been hampered by severe charge carrier recombination induced either by current leakage (insufficient perovskite film coverage) or inferior charge extraction. Herein, an additive‐assisted morphological engineering strategy is used to construct an intriguing bilayer perovskite film featuring a dense bottom layer and a maze‐like top layer. Such maze‐like perovskite films enable the construction of ETL‐free PSCs with a PCE of 18.5% and negligible hysteresis, which can be attributed to the higher crystallinity and superior light‐harvesting capability of the resultant perovskite film, as well as facilitated hole extraction at the hole transport layer (HTL)/perovskite interface. This work provides a simple approach to modify the perovskite film morphology and demonstrates the correlation between facilitated charge‐carrier extraction and high‐performance ETL‐free perovskite photovoltaics.

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Section: Detailed Photovoltaic Parameters (Jsc Voc η and Ff) Of Thmentioning

confidence: 99%

Maze‐Like Halide Perovskite Films for Efficient Electron Transport Layer‐Free Perovskite Solar Cells

Liao

Jiang

et al. 2019

Solar RRL

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“…Yu et al reported the use of hierarchically porous FTO substrate for PSCs. An electrochemical etching is employed to modify the substrate surface to create the porous structure, as shown in Figure a,b.…”

Section: Light Trappingmentioning

confidence: 99%

Optical Design in Perovskite Solar Cells

Deng

2019

Small Methods

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fast development of PSCs from the perspective of architecture optimization, functional material design, [21][22][23][24][25][26][27][28] and interface engineering, [29][30][31][32][33][34][35][36][37] through which the charge dynamics within the device can be optimized with an efficient charge transport and suppressed charge recombination. Moreover, the perovskite film can be fabricated through solution processing, and the high quality thin film can compete with well-known photovoltaic materials such as silicon and GaAs that is processed by high temperature method or vacuum technology, in many vital material properties for photovoltaic application. [10,38] These outstanding optoelectronic properties make it an ideal choice for the nextgeneration photovoltaic devices and the application prospect of PSCs attracts extensive attention from worldwide researchers.The involved optical property of the PSCs also has a huge connection to the device performance since it affects the light absorption and photocarrier generation, which largely determines the final photocurrent and output power. [5,39,40] The composition and bandgap of perovskite can also be tuned to realize a full coverage of light absorption in the visible wavelength range. The perovskite with a direct energy band ensures a superior light absorption ability, and the required thickness of the light active materials can be reduced to construct a thin film device. [41][42][43][44] A highly efficient light management is expected for PSCs. Wang et al. [45] calculated the light distribution for the planar PSCs with a 350-nm thick CH 3 NH 3 PbI 3 (MAPbI 3 ) perovskite film as the light absorber. It is unexpected that only 65% of the incident light can be absorbed by the perovskite film and the remaining loss occurs mainly due to the light escape from the device (15%) and the light reflection at the glass surface (4%). To get a better PCE, it is necessary to optimize the device architecture and maximize the light harvesting of the PSCs. The optical property also has a great impact on the device stability due to the UV light with high-energy photons in the incident solar spectra, [46,47] especially when TiO 2 is used within the PSCs. An intended optical design that enables the device with a transparent or colorful property may help expand the application of PSCs. Thus, the optical design for PSCs should not be ignored, and the optimized optical properties will further boost the device performance. To the best of our knowledge, there have been many impressive advances of optical designs in PSCs as presented by the schematic drawing in Figure 1e. In this review, we first summarize the advanced light trapping technique that is applied on the glass surface, conductive transparent substrate, electron transport layer Organic-inorganic hybrid perovskite solar cells (PSCs) have undergone an unprecedented development in the past few years and their power conversion efficiency (PCE) has reached over 23%. The conversion from light to electricity in the photovoltaic device has an...

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“…Yu et al. [170] modified the surface of the FTO to a hierarchically porous surface by using electrochemical etching to improve charge extraction at the FTO/perovskite interface. By using of etched FTO (E-FTO) instead of the purchased pristine FTO (P-FTO) whose monotonous surface consists of large and sharp SnO 2 crystals, obtains a significant increase in J SC .…”

Section: Main Textmentioning

confidence: 99%

Recent advancements in compact layer development for perovskite solar cells

Mohammadian-Sarcheshmeh

Mazloum-Ardakani

2018

Heliyon

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Herein, we will present recent progress in the compact layer (CL) or hole blocking layer (HBL) which is known as an important layer and not as an essential layer for perovskite solar cells (PSCs). The CL involves an effective role to enhance efficiency in PSCs. Thus, any change, modification, and replacement in this layer will have a profound effect on the performance and improvement of some characteristics such as photo-stability, durability and hysteresis effect. These changes can improve the applications of PSCs in the flexible cell, industrial mass production, high-scale manufacturing. In this review, we will present recent studies on CLs.

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Outstanding Performance of Hole‐Blocking Layer‐Free Perovskite Solar Cell Using Hierarchically Porous Fluorine‐Doped Tin Oxide Substrate

Cited by 51 publications

References 63 publications

Maze‐Like Halide Perovskite Films for Efficient Electron Transport Layer‐Free Perovskite Solar Cells

Maze‐Like Halide Perovskite Films for Efficient Electron Transport Layer‐Free Perovskite Solar Cells

Optical Design in Perovskite Solar Cells

Recent advancements in compact layer development for perovskite solar cells

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