Thickness of the hole transport layer in perovskite solar cells: performance versus reproducibility

RSC Advances ◽  
2015 ◽  
Vol 5 (120) ◽  
pp. 99356-99360 ◽  
Author(s):  
Guan-Woo Kim ◽  
Dipak V. Shinde ◽  
Taiho Park
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Photovoltaic Properties

We systematically studied the effect of the thickness of a spiro-MeOTAD hole transport layer on photovoltaic properties and reproducibility. We find that an interplay exists between the photovoltaic performance and reproducibility.

scholarly journals CuI/Spiro-OMeTAD Double-Layer Hole Transport Layer to Improve Photovoltaic Performance of Perovskite Solar Cells

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 978
Author(s):  
Chaoqun Lu ◽  
Weijia Zhang ◽  
Zhaoyi Jiang ◽  
Yulong Zhang ◽  
Cong Ni
Keyword(s):  
Solar Cells ◽  
Double Layer ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Perovskite Layer

The hole transport layer (HTL) is one of the main factors affecting the efficiency and stability of perovskite solar cells (PSCs). However, obtaining HTLs with the desired properties through current preparation techniques remains a challenge. In the present study, we propose a new method which can be used to achieve a double-layer HTL, by inserting a CuI layer between the perovskite layer and Spiro-OMeTAD layer via a solution spin coating process. The CuI layer deposited on the surface of the perovskite film directly covers the rough perovskite surface, covering the surface defects of the perovskite, while a layer of CuI film avoids the defects caused by Spiro-OMetad pinholes. The double-layer HTLs improve roughness and reduce charge recombination of the Spiro-OMeTAD layer, thereby resulting in superior hole extraction capabilities and faster hole mobility. The CuI/Spiro-OMeTAD double-layer HTLs-based devices were prepared in N2 gloveboxes and obtained an optimized PCE (photoelectric conversion efficiency) of 17.44%. Furthermore, their stability was improved due to the barrier effect of the inorganic CuI layer on the entry of air and moisture into the perovskite layer. The results demonstrate that another deposited CuI film is a promising method for realizing high-performance and air-stable PSCs.

Surface treatment via Li-bis-(trifluoromethanesulfonyl) imide to eliminate the hysteresis and enhance the efficiency of inverted perovskite solar cells

2017 ◽  
Vol 5 (39) ◽  
pp. 10280-10287 ◽  
Author(s):  
Cong Chen ◽  
Guang Yang ◽  
Junjie Ma ◽  
Xiaolu Zheng ◽  
Zhiliang Chen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Surface Treatment ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Long Term Stability

We showed that perovskite solar cells employing Li-treated NiOxas a hole transport layer demonstrated excellent photovoltaic performance, and obtained a power conversion efficiency of up to 18.03%. In addition, the device possessed good long-term stability.

Perovskite solar cells with a DMSO-treated PEDOT:PSS hole transport layer exhibit higher photovoltaic performance and enhanced durability

Nanoscale ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 4236-4243 ◽  
Author(s):  
Di Huang ◽  
Tenghooi Goh ◽  
Jaemin Kong ◽  
Yifan Zheng ◽  
Suling Zhao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer

scholarly journals The Way to Pursue Truly High-Performance Perovskite Solar Cells

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1269 ◽  
Author(s):  
Wu ◽  
Thakur ◽  
Chiang ◽  
Chandel ◽  
Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Hot Electrons ◽  
Electron Transport Layer ◽  
Hole Transport Layer ◽  
Hot Carriers ◽  
Potential Loss

The power conversion efficiency (PCE) of single-junction solar cells was theoretically predicted to be limited by the Shockley–Queisser limit due to the intrinsic potential loss of the photo-excited electrons in the light absorbing materials. Up to now, the optimized GaAs solar cell has the highest PCE of 29.1%, which is close to the theoretical limit of ~33%. To pursue the perfect photovoltaic performance, it is necessary to extend the lifetimes of the photo-excited carriers (hot electrons and hot holes) and to collect the hot carriers without potential loss. Thanks to the long-lived hot carriers in perovskite crystal materials, it is possible to completely convert the photon energy to electrical power when the hot electrons and hot holes can freely transport in the quantized energy levels of the electron transport layer and hole transport layer, respectively. In order to achieve the ideal PCE, the interactions between photo-excited carriers and phonons in perovskite solar cells has to be completely understood.

Efficient inverted planar perovskite solar cells based on inorganic hole-transport layers from nickel-containing organic sol

2019 ◽  
Vol 12 (01) ◽  
pp. 1850088 ◽  
Author(s):  
Weina Zhang ◽  
Jie Tang ◽  
Jihuai Wu ◽  
Zhang Lan
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Simple Solution ◽  
Hole Transport Layer ◽  
Solution Processed ◽  
Transport Dynamics ◽  
Nio Nanocrystals

Due to the rough surface of fluorine-doped tin oxide (FTO) conductive glasses, it is challenging to fabricate fully covered ultra-thin hole-transport layer (HTL) with thickness under 100[Formula: see text]nm by a simple solution-processed method. Yet, the quality of HTLs play a key role in determining photovoltaic performance of the inverted planar perovskite solar cells (PSCs) owing to their important functions for effectively extracting holes, blocking electrons, suppressing dark reaction, and so on. Here, we report a facile nickel-containing organic sol (Ni–Sol) route to fabricate fully covered 46[Formula: see text]nm thick NiO HTLs for efficient inverted planar PSCs. Comparing with the pre-synthesized NiO nanocrystals solution, the Ni–Sol is easier to spread around the rough outline of FTO to achieve higher surface coverage. Through optimizing the concentration of nickel-containing organic sol, the champion performance of the inverted planar PSCs can be achieved because of the high transparency and good hole-transport dynamics of the optimized NiO film. This work demonstrates the advanced Ni–Sol route for preparing efficient inverted planar PSCs by the simple solution-processed method.

Efficient perovskite solar cells with negligible hysteresis achieved by sol–gel-driven spinel nickel cobalt oxide thin films as the hole transport layer

2019 ◽  
Vol 7 (24) ◽  
pp. 7288-7298 ◽  
Author(s):  
Ju Ho Lee ◽  
Young Wook Noh ◽  
In Su Jin ◽  
Sang Hyun Park ◽  
Jae Woong Jung
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Sol Gel ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Critical Issue ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Current Voltage

Current–voltage hysteresis is a critical issue that impacts the photovoltaic performance of perovskite solar cells, and thus, it is imperative to develop high-efficiency perovskite solar cells without hysteresis behavior.

Perovskite solar cells employing an eco-friendly and low-cost inorganic hole transport layer for enhanced photovoltaic performance and operational stability

2019 ◽  
Vol 7 (12) ◽  
pp. 7065-7073 ◽  
Author(s):  
Xin Li ◽  
Junyou Yang ◽  
Qinghui Jiang ◽  
Hui Lai ◽  
Shuiping Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Low Cost ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Operational Stability ◽  
Transport Layer ◽  
Hole Transport Layer

A novel and eco-friendly MnS is employed as an inorganic HTL in a perovskite device with high PCE of ∼20%.

scholarly journals Plasma-Exposure-Induced Mobility Enhancement of LiTFSI-Doped Spiro-OMeTAD Hole Transport Layer in Perovskite Solar Cells and Its Impact on Device Performance

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3142
Author(s):  
Hao Qu ◽  
Gao Zhao ◽  
Yumeng Wang ◽  
Lijuan Liang ◽  
Long Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Hole Mobility ◽  
Surface Cleaning ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Plasma Exposure ◽  
Ar Plasma

2,2′,7,7′-Tetrakis(N,N-di-p-methoxyphenyl-amine)-9,9′-spirobifluorene (spiro-OMeTAD) film currently prevails as hole transport layer (HTL) employed in perovskite solar cells (PSCs). However, the standard preparation method for spin-coated, Lithium bis(trifluoromethylsulfony) imide (LiTFSI)-doped, spiro-OMeTAD HTL depends on a time-consuming and uncontrolled oxidation process to gain desirable electrical conductivity to favor device operation. Our previous work demonstrated that ~10 s oxygen or oxygen containing gas discharge plasma exposure can oxidize spiro-OMeTAD HTL effectively and make PSCs work well. In this communication, hole-only devices are fabricated and in-situ current density-voltage measurements are performed to investigate the change in hole mobility of LiTFSI-doped spiro-OMeTAD films under plasma exposure. The results reveal that hole mobility values can be increased averagely from ~5.0 × 10−5 cm2V−1s−1 to 7.89 × 10−4 cm2V−1s−1 with 7 s O2 plasma exposure, and 9.33 × 10−4 cm2V−1s−1 with 9 s O2/Ar plasma exposure. The effects on the photovoltaic performance of complete PSC devices are examined, and optical emission spectroscopy (OES) is used for a diagnostic to explain the different exposure effects of O2 and O2/Ar plasma. High efficiency, fine controllability and good compatibility with current plasma surface cleaning techniques may make this method an important step towards the future commercialization of photovoltaic technologies employing spiro-OMeTAD hole transport material.

Low Temperature VOx Hole Transport Layer for Enhancing the Performance of Carbon-Based Perovskite Solar Cells

2021 ◽  
Vol 16 (2) ◽  
pp. 273-280
Author(s):  
Ruiyuan Hu ◽  
Yang Li ◽  
Zhongbao Que ◽  
Shuaibo Zhai ◽  
Yifei Feng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Low Temperature ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Carbon Electrode ◽  
Long Term Stability

Carbon electrode based perovskite solar cells (PSCs) have attracted more attention owing to low product cost, long term stability and simple fabrication technology. Usually carbon electrode based PSCs are fabricated without hole transport layer, which results in slow development in photovoltaic performance and practical application. In this work, we synthesized p-type semiconductor VOx films via low temperature solution process. And the prepared VOx film was introduced into the carbon electrode based PSCs as hole transport layer, which is highly beneficial to further enhance the power conversion efficiencies. Here, we have demonstrated that solution processed VOx film is suitable to be the hole transport layer for PSCs based on low temperature carbon electrode. With the optimized layers of VOx, carbon electrode based PSCs with VOx exhibit enhanced photovoltaic performance compared with hole transport layer free PSCs. In the meanwhile, carbon electrode based PSCs with VOx hole transport layer have long term stability.

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