Publications de Hiroyuki Kanda

Solubilizing and stabilizing C60 with n-type polymer enables efficient inverted perovskite solar cells

Mohammad Khaja Nazeeruddin, Jianxing Xia, Hiroyuki Kanda

Pristine fullerene C60 is currently the best-performing electron transport layer (ETL) for perovskite solar cells (PSCs) but suffers from significant aggregation in solution. Consequently, the high-cost and complex thermal evaporation method is typically u ...

2025

Dopant-additive synergism enhances perovskite solar modules

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Zhaofu Fei, Farzaneh Fadaei Tirani, Yong Ding, Bin Ding, Hiroyuki Kanda, Keith Gregory Brooks

Perovskite solar cells (PSCs) are among the most promising photovoltaic technologies owing to their exceptional optoelectronic properties 1,2 . However, the lower efficiency, poor stability and reproducibility issues of large-area PSCs compared with labora ...

Nature Portfolio2024

Enhancing the Efficiency and Stability of Perovskite Solar Cells Using Chemical Bath Deposition of SnO2 Electron Transport Layers and 3D/2D Heterojunctions

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Zhaofu Fei, Pascal Alexander Schouwink, David Fernando Reyes Vasquez, Hiroyuki Kanda, Liping Zhong

Chemical bath deposition (CBD) is an effective technique used to produce high-quality SnO2 electron transport layers (ETLs) employed in perovskite solar cells (PSCs). By optimizing the CBD process, high-quality SnO2 films are obtained with minimal oxygen v ...

2024

Ultra-uniform perovskite crystals formed in the presence of tetrabutylammonium bistriflimide afford efficient and stable perovskite solar cells

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Zhaofu Fei, Yong Ding, Jianxing Xia, Hiroyuki Kanda, Hobeom Kim, Jaekeun Lim, Alwani Imanah Rafieh

Compositional engineering of organic-inorganic metal halide perovskite allows for improved optoelectrical properties, however, phase segregation occurs during crystal nucleation and limits perovskite solar cell device performance. Herein, we show that by a ...

2024

Shallow-level defect passivation by 6H perovskite polytype for highly efficient and stable perovskite solar cells

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Farzaneh Fadaei Tirani, Pascal Alexander Schouwink, Yong Ding, Hiroyuki Kanda, Hobeom Kim, So-Min Yoo

The power conversion efficiency of perovskite solar cells continues to increase. However, defects in perovskite materials are detrimental to their carrier dynamics and structural stability, ultimately limiting the photovoltaic characteristics and stability ...

Nature Research2024

Foldable Hole-Transporting Materials for Merging Electronic States between Defective and Perfect Perovskite Sites

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Jianxing Xia, Kasparas Rakstys, Yi Zhang, Hiroyuki Kanda, Keith Gregory Brooks, Ruiyuan Hu, Qurat Ul Ain

Defective and perfect sites naturally exist within electronic semiconductors, and considerable efforts to reduce defects to improve the performance of electronic devices, especially in hybrid organic-inorganic perovskites (ABX(3)), are undertaken. Herein, ...

Wiley-V C H Verlag Gmbh2023

Tuning 2D Perovskite Passivation: Impact of Electronic and Steric Effects on the Performance of 3D/2D Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Roland Christopher Turnell-Ritson, Ümmügülsüm Günes, Hiroyuki Kanda

Surface passivation with 2D perovskites is a powerful strategy to achieve improved stability and performance in perovskite solar cells (PSCs). Various large organic cations have been successfully implemented, led by phenylethylammonium (PEA+) and its deriv ...

WILEY-V C H VERLAG GMBH2023

Transparent Liquid Crystal Hole-Transporting Material for Stable Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Jianxing Xia, Kasparas Rakstys, Hiroyuki Kanda

Hexakis(hexyloxy)triphenylene (HAT6) discotic liquid crystal is employed as a transparent hole-transporting material (HTM) for perovskite solar cells (PSCs) and a power conversion efficiency (PCE) of 15.7% is obtained, which is the highest using HAT6 type ...

WILEY-V C H VERLAG GMBH2023

Drastic influence of substituent position on orientation of 2D layers enables efficient and stable 3D/2D perovskite solar cells

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Andreas Züttel, Ümmügülsüm Günes, Hiroyuki Kanda, Liping Zhong

The lack of long-term stability and reproducibility of perovskite solar cells (PSCs) is the main roadblock preventing their successful commercialization. 3D/2D PSCs are one of the most prominent ways to address these issues. Various salts that are mostly b ...

CELL PRESS2023

Retarding solid-state reactions enable efficient and stable all-inorganic perovskite solar cells and modules

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Rosario Scopelliti, Zhaofu Fei, Farzaneh Fadaei Tirani, Yong Ding, Bin Ding, Yen-Cheng Liu, Hiroyuki Kanda, Olga Syzgantseva

All-inorganic CsPbI3 perovskite solar cells (PSCs) with efficiencies exceeding 20% are ideal candidates for appli-cation in large-scale tandem solar cells. However, there are still two major obstacles hindering their scale-up: (i) the inhomogeneous solid-s ...

AMER ASSOC ADVANCEMENT SCIENCE2023