Results 71 to 80 of about 58,832 (346)

Nonradiative Energy Losses in Bulk-Heterojunction Organic Photovoltaics

Physical Review X, 2018
The performance of solar cells based on molecular electronic materials is limited by relatively high nonradiative voltage losses. The primary pathway for nonradiative recombination in organic donor-acceptor heterojunction devices is believed to be the ...
Mohammed Azzouzi, Jun Yan, Thomas Kirchartz, Kaikai Liu, Jinliang Wang, Hongbin Wu, Jenny Nelson   +6 more
doaj   +1 more source

Balancing efficiency and transparency in organic transparent photovoltaics

npj Flexible Electronics, 2022
The challenges in transparent photovoltaic (TPV) fields are still that the device transparency and efficiency are difficult to be balanced to meet the requirements of practical applications.
Ruiqian Meng, Qianqing Jiang, Dianyi Liu
doaj   +1 more source

Enhancing Indoor Photovoltaic Efficiency to 37.6% Through Triple Passivation Reassembly and n‐Type to p‐Type Modulation in Wide Bandgap Perovskites

Advanced Functional Materials, EarlyView.
Triple Passivation Treatment (TPT) strategy enables 1.75 eV wide‐bandgap perovskite solar cells (WB‐PSCs) with suppressed halide phase segregation and n‐to‐p type surface transition. The photoluminescence quantum yield increases from 0.5 to 2.1%, indicating reduced non‐radiative losses.
Siming Huang, Shanyue Hou, Galyam Sanfo, Jingdong Xu, Yuting Wang, Himal Muwanwella, Lukas Pfeifer, Xiang Liu, Shaik M Zakeeruddin, Yuelong Huang, Michael Grätzel, Muhammad Tariq Sajjad, Mojtaba Abdi‐Jalebi   +12 more
wiley   +1 more source

Computational predictions of energy materials using density functional theory [PDF]

, 2016
In the search for new functional materials, quantum mechanics is an exciting starting point. The fundamental laws that govern the behaviour of electrons have the possibility, at the other end of the scale, to predict the performance of a material for a ...
Jain, A, Persson, KA, Shin, Y
core   +1 more source

Advanced Nano‐Fibrillated Cellulose/Modified MXene Janus Membrane for Continuous 24‐h Water‐Power Co‐Generation

Advanced Functional Materials, EarlyView.
The Janus membrane integrates a superhydrophilic CNF@CTAB‐MXene layer with a superhydrophobic PTFE layer, enabling efficient solar‐driven water evaporation and electricity generation. It achieves an evaporation rate of 1.51 kg m−2 h−1 with excellent salt resistance and long‐term stability.
Yinan Li, Liulian Huang, Zhibin He, Jianguo Li, Chenglong Fu, Qinghong Zheng, Lihui Chen, Yonghao Ni   +7 more
wiley   +1 more source

Investigation of Thermal Instability of Additive-Based High-Efficiency Organic Photovoltaics

International Journal of Photoenergy, 2014
Most photovoltaics operate at high temperature under sunlight. In this work, the thermal instability of diiodooctane-based high-efficiency bulk heterojunction (BHJ) organic photovoltaics (OPVs) is studied.
En-Ping Yao, Yi-Jhe Tsai, Wei-Chou Hsu
doaj   +1 more source

Dual Side Chain Functionalization of Small Molecule Acceptors Affords High‐Performance Organic Solar Cells With Refined Blend Morphology

Advanced Functional Materials, EarlyView.
A new small‐molecule acceptor (SMA‐Ph‐CF3) is developed using a dual side chain functionalization strategy that incorporates trifluoromethyl and phenyl groups. This approach enables precise tuning of blend morphology, leading to the fabrication of high‐performance organic solar cells with a power conversion efficiency of 18.5%.
Shinbee Oh, Kihyun Bae, Dahyun Jeong, Tan Ngoc‐Lan Phan, Jin‐Woo Lee, Bumjoon J. Kim   +5 more
wiley   +1 more source

Long-term efficient organic photovoltaics based on quaternary bulk heterojunctions

Nature Communications, 2017
Organic photovoltaics suffer from degradation. Here, Namet al. develop a quaternary blend and fabricate devices which lose 28% of their initial efficiency after one year of operation at 65 °C.
Minwoo Nam, Minjeong Cha, Hyun Hwi Lee, Kahyun Hur, Kyu-Tae Lee, Jaehong Yoo, Il Ki Han, S. Joon Kwon, Doo-Hyun Ko   +8 more
doaj   +1 more source

Hole Transfer Dynamics in Thin Films of Mixed‐Dimensional Quasi‐2D Perovskites

Advanced Functional Materials, EarlyView.
Charge transfer dynamics in quasi‐2D perovskite (PEA2MAn−1PbnI3n+1), grown with a distinct dimensionality gradient are investigated. Selective excitation of the n = 4 phase reveals efficient hole transfer to n = 2 and n = 3 within tens of picoseconds, while n = 1 acts as a hole‐blocking layer. These findings highlight the importance of minimizing n = 1
Giuseppe Ammirati, Stefano Turchini, Francesco Toschi, Patrick O'Keeffe, Alessandra Paladini, Faustino Martelli, Reem Khanfar, Daimiota Takhellambam, Sara Pescetelli, Antonio Agresti, Daniele Catone   +10 more
wiley   +1 more source

Intrinsically stretchable organic photovoltaics by redistributing strain to PEDOT:PSS with enhanced stretchability and interfacial adhesion

Nature Communications
Intrinsically stretchable organic photovoltaics have emerged as a prominent candidate for the next-generation wearable power generators regarding their structural design flexibility, omnidirectional stretchability, and in-plane deformability.
Jiachen Wang, Yuto Ochiai, Niannian Wu, Kiyohiro Adachi, Daishi Inoue, Daisuke Hashizume, Desheng Kong, Naoji Matsuhisa, Tomoyuki Yokota, Qiang Wu, Wei Ma, Lulu Sun, Sixing Xiong, Baocai Du, Wenqing Wang, Chih-Jen Shih, Keisuke Tajima, Takuzo Aida, Kenjiro Fukuda, Takao Someya   +19 more
doaj   +1 more source