Ordered Single-Crystalline Anatase TiO2Nanorod Clusters Planted on Graphene for Fast Charge Transfer in Photoelectrochemical Solar Cells

Small ◽  
2017 ◽  
Vol 13 (28) ◽  
pp. 1700793 ◽  
Author(s):  
Yang Wang ◽  
Xueqin Liu ◽  
Zhen Li ◽  
Ya Cao ◽  
Yinchang Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Single Crystalline ◽  
Fast Charge ◽  
Photoelectrochemical Solar Cells

Synthesis of oriented TiO2 nanocones with fast charge transfer for perovskite solar cells

Nano Energy ◽  
2015 ◽  
Vol 11 ◽  
pp. 409-418 ◽  
Author(s):  
Dong Zhong ◽  
Bing Cai ◽  
Xiuli Wang ◽  
Zhou Yang ◽  
Yedi Xing ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Perovskite Solar Cells ◽  
Fast Charge

scholarly journals Formation of a Fast Charge Transfer Channel in Quasi-2D Perovskite Solar Cells through External Electric Field Modulation

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7402
Author(s):  
Xixiang Zhu ◽  
Liping Peng ◽  
Jinpeng Li ◽  
Haomiao Yu ◽  
Yulin Xie
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Electric Field ◽  
Quantum Wells ◽  
External Electric Field ◽  
Perovskite Solar Cells ◽  
Fast Charge ◽  
Transfer Channel ◽  
Local Polarization ◽  
Field Modulation

Quasi-2D perovskites solar cells exhibit excellent environmental stability, but relatively low photovoltaic properties, compared with 3D perovskites solar cells. However, charge transport and extraction in quasi-2D perovskite solar cells are still limited by the inevitable quantum well effect, resulting in low power conversion efficiency (PCE). To date, most efforts concentrate on crystal orientation and favorable alignment during materials and films processing. In this paper, we demonstrated that the quasi-2D perovskite [(BA)2(MA)3Pb4I13 (n = 4)] solar cells show an optimized device performance through forming a fast charge transfer channel among 2D quantum wells through external electric field modulation, with appropriate modulation bias and time after the device has been fabricated. Essentially, ions will move directionally due to local polarization in quasi-2D perovskite solar cells under the action of electric field modulation. More importantly, the mobile ions function as a dopant to de-passivate the defects when releasing at grain boundaries, while decreasing built-in potential by applying forward modulation bias with proper modulation time. The capacitance-voltage characteristics indicate that electric field modulation can decrease the charge accumulation and improve the charge collection in quasi-2D perovskite solar cells. Photoluminescence (PL) studies confirm that the non-radiative recombination is reduced by electric field modulation, leading to enhanced charge transfer. Our work indicates that external electric field modulation is an effective method to form a fast charge transfer channel among 2D quantum wells, leading to enhanced charge transfer and charge collection through local polarization toward developing high–performance quasi-2D perovskite devices.

Boron–nitrogen substituted planar cores: designing dopant-free hole-transporting materials for efficient perovskite solar cells

Nanoscale ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 4241-4248
Author(s):  
Mengyao Hao ◽  
Weijie Chi ◽  
Zesheng Li
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Perovskite Solar Cells ◽  
Binding Ability ◽  
Perovskite Layer ◽  
Free Hole ◽  
Fast Charge ◽  
Hole Transporting ◽  
Hole Transporting Materials ◽  
Boron Nitrogen

Newly developed organoboron HTMs show strong interface binding ability and fast charge transfer from the perovskite layer to the HTM layer.

Enhancing the interfacial carrier dynamic in perovskite solar cells with an ultra-thin single-crystalline nanograss-like TiO2 electron transport layer

2020 ◽  
Vol 8 (27) ◽  
pp. 13820-13831
Author(s):  
Akrajas Ali Umar ◽  
Xin Zhang ◽  
Siti Khatijah Md Saad ◽  
Nurul Ain Abd Malek ◽  
Kai Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Electron Transport ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Interfacial Charge Transfer ◽  
Single Crystalline ◽  
Carrier Dynamic ◽  
Interfacial Charge

Single crystalline, ultrathin TiO2 nanograss grown directly on ITO provides a highly efficient interfacial charge transfer in perovskite solar cells.

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