Conjugated Polymer–Assisted Grain Boundary Passivation for Efficient Inverted Planar Perovskite Solar Cells DOI
Wei Chen, Yingfeng Wang,

Guotao Pang

et al.

Advanced Functional Materials, Journal Year: 2019, Volume and Issue: 29(27)

Published: May 1, 2019

Abstract Grain boundaries in lead halide perovskite films to increased recombination losses and decreased device stability under illumination due defect‐mediated ion migration. The effect of a conjugated polymer additive, poly(bithiophene imide) (PBTI), is investigated the antisolvent treatment step film deposition by comprehensive characterization properties performance inverted planar solar cells (PSCs). PBTI found be incorporated within grain boundaries, which results an improvement crystallinity reduced defects. successful defect passivation yields reduces consequently increases power conversion efficiency (PCE). In addition, it gives rise improved photoluminescence PSC can attributed optimal devices exhibit PCE 20.67% compared 18.89% control without PBTI, while they retain over 70% initial after 600 h 1 sun 56% for devices.

Language: Английский

A piperidinium salt stabilizes efficient metal-halide perovskite solar cells DOI
Yen‐Hung Lin, Nobuya Sakai, Peimei Da

et al.

Science, Journal Year: 2020, Volume and Issue: 369(6499), P. 96 - 102

Published: July 2, 2020

Longevity has been a long-standing concern for hybrid perovskite photovoltaics. We demonstrate high-resilience positive-intrinsic-negative solar cells by incorporating piperidinium-based ionic compound into the formamidinium-cesium lead-trihalide absorber. With bandgap tuned to be well suited perovskite-on-silicon tandem cells, this piperidinium additive enhances open-circuit voltage and cell efficiency. This also retards compositional segregation impurity phases pinhole formation in absorber layer during aggressive aging. Under full-spectrum simulated sunlight ambient atmosphere, our unencapsulated encapsulated retain 80 95% of their peak post-burn-in efficiencies 1010 1200 hours at 60° 85°C, respectively. Our analysis reveals detailed degradation routes that contribute failure aged cells.

Language: Английский

Citations

586
Interfacial engineering of Bi2S3/Ti3C2Tx MXene based on work function for rapid photo-excited bacteria-killing DOI Creative Commons
Jianfang Li, Zhaoyang Li, Xiangmei Liu

et al.

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: Feb. 22, 2021

Abstract In view of increasing drug resistance, ecofriendly photoelectrical materials are promising alternatives to antibiotics. Here we design an interfacial Schottky junction Bi 2 S 3 /Ti C T x resulting from the contact potential difference between Ti and . The different work functions induce formation a local electrophilic/nucleophilic region. self-driven charge transfer across interface increases electron density on formed barrier inhibits backflow electrons boosts separation. photocatalytic activity intensively improved amount reactive oxygen species under 808 nm near-infrared radiation. They kill 99.86% Staphylococcus aureus 99.92% Escherichia coli with assistance hyperthermia within 10 min. We propose theory engineering based function accordingly photoresponsive using two kinds components effectively eradicate bacterial infection.

Language: Английский

Citations

466
Inverted perovskite solar cells using dimethylacridine-based dopants DOI
Qin Tan, Zhaoning Li, Guangfu Luo

et al.

Nature, Journal Year: 2023, Volume and Issue: 620(7974), P. 545 - 551

Published: May 24, 2023

Language: Английский

Citations

439
A monothiophene unit incorporating both fluoro and ester substitution enabling high-performance donor polymers for non-fullerene solar cells with 16.4% efficiency DOI
Huiliang Sun, Tao Liu, Jianwei Yu

et al.

Energy & Environmental Science, Journal Year: 2019, Volume and Issue: 12(11), P. 3328 - 3337

Published: Jan. 1, 2019

Both fluorine and ester substituted monothiophene yielded a novel thiophene derivative FE-T. The resulting polymer donor S1 enabled single-junction non-fullerene solar cell with over 16% efficiency.

Language: Английский

Citations

363
Origins and influences of metallic lead in perovskite solar cells DOI Creative Commons
Jiwei Liang, Xuzhi Hu, Chen Wang

et al.

Joule, Journal Year: 2022, Volume and Issue: 6(4), P. 816 - 833

Published: April 1, 2022

Language: Английский

Citations

346
Dopant‐Free Small‐Molecule Hole‐Transporting Material for Inverted Perovskite Solar Cells with Efficiency Exceeding 21% DOI
Yang Wang, Wei Chen, Lei Wang

et al.

Advanced Materials, Journal Year: 2019, Volume and Issue: 31(35)

Published: July 11, 2019

Hole-transporting materials (HTMs) play a critical role in realizing efficient and stable perovskite solar cells (PVSCs). Considering their capability of enabling PVSCs with good device reproducibility long-term stability, high-performance dopant-free small-molecule HTMs (SM-HTMs) are greatly desired. However, such SM-HTMs highly elusive, limiting the current record efficiencies inverted to around 19%. Here, two novel donor-acceptor-type (MPA-BTI MPA-BTTI) devised, which synergistically integrate several design principles for HTMs, exhibit comparable optoelectronic properties but distinct molecular configuration film properties. Consequently, MPA-BTTI-based achieve remarkable efficiency 21.17% negligible hysteresis superior thermal stability under illumination, breaks long-time standing bottleneck development PVSCs. Such breakthrough is attributed well-aligned energy levels, appropriate hole mobility, most importantly, excellent morphology MPA-BTTI. The results underscore effectiveness tactics, providing new avenue developing

Language: Английский

Citations

324
Alkali Chlorides for the Suppression of the Interfacial Recombination in Inverted Planar Perovskite Solar Cells DOI
Wei Chen, Yecheng Zhou,

Guocong Chen

et al.

Advanced Energy Materials, Journal Year: 2019, Volume and Issue: 9(19)

Published: March 25, 2019

Abstract In this work, significant suppression of the interfacial recombination by facile alkali chloride interface modification NiOx hole transport layer in inverted planar perovskite solar cells is achieved. Experimental and theoretical results reveal that improved ordering films, which turn reduces defect/trap density, causing reduced recombination. This leads to a improvement open‐circuit voltage from 1.07 eV for pristine 1.15 KCl‐treated NiOx, resulting power conversion efficiency approaching 21%. Furthermore, ion diffusion devices observed, as evidenced stable photoluminescence (PL) under illumination high PL quantum with treatment, opposed luminescence enhancement low observed on NiOx. The suppressed also consistent stability Thus, it demonstrated simple an effective method not only suppress but migration layers deposited modified due defect density.

Language: Английский

Citations

303
New Strategies for Defect Passivation in High‐Efficiency Perovskite Solar Cells DOI
Seçkin Akın,

Neha Arora,

Shaik M. Zakeeruddin

et al.

Advanced Energy Materials, Journal Year: 2019, Volume and Issue: 10(13)

Published: Nov. 19, 2019

Abstract Lead halide perovskite solar cells now show excellent efficiencies and encouraging levels of stability. Further improvements in performance require better control the trap states which are considered to be associated with vacancies defects at crystallite surfaces. Herein, a reflection on ways these traps can mitigated is presented by improving quality layer interfaces fully assembled device configurations. In this review, most recent design strategies reported literature, have been explored tune grain orientation, passivate defects, improve charge‐carrier lifetimes, presented. Specifically, advances made single‐cation, mixed‐cation and/or mixed‐halide, 3D/2D bilayer‐based light absorbers discussed. The interfacial, compositional, band alignment engineering along their consequent effects open‐circuit voltage, power conversion efficiency, stability particular focus.

Language: Английский

Citations

303
Efficiency progress of inverted perovskite solar cells DOI
Xuesong Lin,

Danyu Cui,

Xinhui Luo

et al.

Energy & Environmental Science, Journal Year: 2020, Volume and Issue: 13(11), P. 3823 - 3847

Published: Jan. 1, 2020

A comprehensive review on the efficiency progress of inverted perovskite solar cells towards future development and commercialization.

Language: Английский

Citations

285
High Electron Affinity Enables Fast Hole Extraction for Efficient Flexible Inverted Perovskite Solar Cells DOI

Pengbin Ru,

Enbing Bi,

Yao Zhang

et al.

Advanced Energy Materials, Journal Year: 2020, Volume and Issue: 10(12)

Published: Jan. 30, 2020

Abstract Inverted perovskite solar cells (PSCs) with low‐temperature processed hole transporting materials (HTMs) suffer from poor performance due to the inferior hole‐extraction capability at HTM/perovskite interfaces. Here, molecules controlled electron affinity enable a HTM conductivity improved by more than ten times and decreased energy gap between Fermi level valence band 0.60 0.24 eV, leading enhancement of capacity five times. As result, 3,6‐difluoro‐2,5,7,7,8,8‐hexacyanoquinodimethane are used for first time enhancing open‐circuit voltage ( V oc ) fill factor (FF) PSCs, which rigid‐and flexible‐based inverted devices achieving highest power conversion efficiencies 22.13% 20.01%, respectively. This new method significantly enhances FF can be widely combined HTMs based on not only NiO x but also PTAA, PEDOTT:PSS, CuSCN, providing way realizing efficient PSCs.

Language: Английский

Citations

266