Concept

Energy transformation

Related publications (253)

Efficiency vs. stability: dopant-free hole transporting materials towards stabilized perovskite solar cells

Mohammad Khaja Nazeeruddin, Kasparas Rakstys, Cansu Igci

In the last decade, perovskite solar cells have been considered a promising and burgeoning technology for solar energy conversion with a power conversion efficiency currently exceeding 24%. However, although perovskite solar cells have achieved high power ...

2019

Laser shock peening: A promising tool for tailoring metallic microstructures in selective laser melting

Roland Logé, Ke Huang, Nikola Kalentics, Valerio Romano, Andreas Burn, Manuel Ortega Varela De Seijas

Metallic parts made by Selective Laser Melting (SLM) are known for their heterogeneous microstructures in the as-built (AB) state. In this paper, Laser Shock Peening (ISP) was performed on a 316 L stainless steel part fabricated by SLM. The LSP treatment i ...

2019

Phthalocyanines and porphyrinoid analogues as hole- and electron-transporting materials for perovskite solar cells

Mohammad Khaja Nazeeruddin

Organic-inorganic lead halide perovskite absorbers in combination with electron and hole transporting selective contacts result in power conversion efficiencies of over 23% under AM 1.5 sun conditions. The advantage of perovskite solar cells is their simpl ...

2019

Nanoscale Lead(II) Iodide-sensitized Solar Cell

Mohammad Khaja Nazeeruddin, So-Min Yoo

Nanometer-sized PbI2 particles were deposited over mesoporous TiO2 film by spin-coating and tested as a photosensitizer. The as-prepared PbI2-sensitized solar cell gave overall power conversion efficiency of 1.41% which was almost four times better than a ...

2019

A sequential condensation route as a versatile platform for low cost and efficient hole transport materials in perovskite solar cells

Mohammad Khaja Nazeeruddin

In an effort to diminish the cost of perovskite solar cells (PSCs) with regard to hole transport materials (HTMs), we employed an easily attainable condensation route to synthesize a cheap and efficient HTM. Using a newly engineered small organic molecule, ...

2019

An Oxa[5]helicene-Based Racemic Semiconducting Glassy Film for Photothermally Stable Perovskite Solar Cells

Shaik Mohammed Zakeeruddin, Filippo de Angelis, Peng Wang, Yang Li, Jialin Wang

Attaining the durability of high-efficiency perovskite solar cells (PSCs) operated under concomitant light and thermal stresses is still a serious concern before large-scale application. It is crucial to maintain the phase stability of the organic hole-tra ...

CELL PRESS2019

A new test method of AC loss assessment for fusion conductors

Pierluigi Bruzzone, Kamil Sedlák, Boris Stepanov

The coupling currents loss for fusion conductors is frequently assessed applying a sinusoidal field sweep of fixed, small amplitude and variable frequency. From the initial slope of the loss curve, the coupling loss time constant is derived and applied in ...

ELSEVIER SCIENCE SA2019

PbZrTiO3 ferroelectric oxide as an electron extraction material for stable halide perovskite solar cells

Shaik Mohammed Zakeeruddin, Ulf Anders Hagfeldt, Michael Saliba, Silver Hamill Turren Cruz, Zaiwei Wang, Hui-Seon Kim, Monica Marcela Lira Cantu, Haibing Xie, Anna Morales Melgares

State-of-the-art halide perovskite solar cells employ semiconductor oxides as electron transportmaterials. Defects in these oxides, such as oxygen vacancies (Ovac), act as recombination centres and, in air and UV light, reduce the stability of the solar ce ...

ROYAL SOC CHEMISTRY2019

Orientation-Controlled Nonradiative Energy Transfer to Colloidal Nanoplatelets: Engineering Dipole Orientation Factor

Didem Dede, Ibrahim Tanriöver

We proposed and showed strongly orientation-controlled Forster resonance energy transfer (FRET) to highly anisotropic CdSe nanoplatelets (NPLs). For this purpose, we developed a liquidair interface self-assembly technique specific to depositing a complete ...

2019

Perovskite Solar Cells Yielding Reproducible Photovoltage of 1.20 V

Michael Graetzel, Shaik Mohammed Zakeeruddin, Wolfgang Richard Tress, Mohammad Ibrahim Dar, Neha Arora, Pankaj Kumar Yadav, Essa Awadh R Alharbi

High photovoltages and power conversion efficiencies of perovskite solar cells (PSCs) can be realized by controlling the undesired nonradiative charge carrier recombination. Here, we introduce a judicious amount of guanidinium iodide into mixed-cation and ...

2019

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