Identification of Trap States in Perovskite Solar Cells

2015 ◽  
Vol 6 (12) ◽  
pp. 2350-2354 ◽  
Author(s):  
Andreas Baumann ◽  
Stefan Väth ◽  
Philipp Rieder ◽  
Michael C. Heiber ◽  
Kristofer Tvingstedt ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Trap States

Efficient Defect Passivation with Niacin for High-Performance and Stable Perovskite Solar Cells

2021 ◽  
Author(s):  
Jing Ren ◽  
Shurong Wang ◽  
Jianxing Xia ◽  
Chengbo Li ◽  
Lisha Xie ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
High Performance ◽  
Perovskite Solar Cells ◽  
Trap States ◽  
Carrier Recombination ◽  
Defect Passivation ◽  
Recombination Centers ◽  
Charge Carrier Recombination ◽  
Halide Perovskite

Defects, inevitably produced in the solution-processed halide perovskite films, can act as charge carrier recombination centers to induce severe energy loss in perovskite solar cells (PSCs). Suppressing these trap states...

scholarly journals Response to Comment on “Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells”

Science ◽  
2021 ◽  
Vol 371 (6532) ◽  
pp. eabd8598
Author(s):  
Zhenyi Ni ◽  
Shuang Xu ◽  
Jinsong Huang
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Differential Capacitance ◽  
Drive Level ◽  
Trap Density ◽  
Trap States ◽  
Doping Analysis ◽  
Metal Halide Perovskite ◽  
Diffusion Capacitance ◽  
Halide Perovskite

Ravishankar et al. claimed that drive-level capacitance profiling (DLCP) cannot resolve trap density in perovskites of given thickness. We point out that the trap densities derived by DLCP are from the differential capacitance at different frequencies; thus, the background charges caused by diffusion and geometry capacitance have been subtracted. Even for the nondifferential doping analysis, the contribution from diffusion capacitance is negligible and that from geometry capacitance is excluded.

Passivation of interstitial and vacancy mediated trap-states for efficient and stable triple-cation perovskite solar cells

2018 ◽  
Vol 383 ◽  
pp. 59-71 ◽  
Author(s):  
Md Arafat Mahmud ◽  
Naveen Kumar Elumalai ◽  
Mushfika Baishakhi Upama ◽  
Dian Wang ◽  
Vinicius R. Gonçales ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Trap States

scholarly journals Boosting efficiency of planar heterojunction perovskite solar cells by a low temperature TiCl4 treatment

2018 ◽  
Vol 08 (02) ◽  
pp. 1850009
Author(s):  
Enqi Wang ◽  
Peng Chen ◽  
Xingtian Yin ◽  
Bowen Gao ◽  
Wenxiu Que
Keyword(s):  
Solar Cells ◽  
Low Temperature ◽  
Surface Defects ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Trap States ◽  
Control Devices ◽  
Planar Heterojunction ◽  
Better Than

It is well known that electron transport layer (ETL) plays an indispensable role in the planar heterojunction perovskite solar cells (PSCs). TiO2 is widely used as an ETL material due to its excellent transport properties, however, the presence of defects in the TiO2 layer diminishes the power conversion efficiency (PCE) of the devices. Herein, we introduce a method of low-temperature TiCl4 treatment to deposit a TiOx layer on the surface of TiO2 film, which can effectively passivate trap states at the TiO2 surface. Moreover, the treating process is optimized to be 30[Formula: see text]min using a 40[Formula: see text]mM TiCl4 aqueous solution. Benefiting from this, we obtain the champion device with the highest PCE of 18.47%, which is mainly due to the reduction of surface defects and the deposition of the well-crystallized perovskite films. Besides, the modified PSCs exhibit an average PCE of 17.59%, which is much better than the control devices.

Stabilizing n-type hetero-junctions for NiOx based inverted planar perovskite solar cells with an efficiency of 21.6%

2020 ◽  
Vol 8 (4) ◽  
pp. 1865-1874 ◽  
Author(s):  
Wei Chen ◽  
Guotao Pang ◽  
Yecheng Zhou ◽  
Yizhe Sun ◽  
Fang-Zhou Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Efficiency Improvement ◽  
Trap States

We demonstrate a substantial suppression of interfacial trap states in inverted PSCs via CdZnSeS QDs, leading to a large efficiency improvement.

Effect of energetic distribution of trap states on fill factor in perovskite solar cells

2020 ◽  
Vol 479 ◽  
pp. 229077
Author(s):  
Ming-Yang Hao ◽  
Hao-Yi Wang ◽  
Yi Wang ◽  
Yujun Qin ◽  
Jian-Ping Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
Perovskite Solar Cells ◽  
Trap States

scholarly journals Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells

Science ◽  
2020 ◽  
Vol 367 (6484) ◽  
pp. 1352-1358 ◽  
Author(s):  
Zhenyi Ni ◽  
Chunxiong Bao ◽  
Ye Liu ◽  
Qi Jiang ◽  
Wu-Qiang Wu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Single Crystals ◽  
Surface Passivation ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Metal Halide ◽  
Trap States ◽  
Deep Traps ◽  
Metal Halide Perovskite ◽  
Halide Perovskite

We report the profiling of spatial and energetic distributions of trap states in metal halide perovskite single-crystalline and polycrystalline solar cells. The trap densities in single crystals varied by five orders of magnitude, with a lowest value of 2 × 1011 per cubic centimeter and most of the deep traps located at crystal surfaces. The charge trap densities of all depths of the interfaces of the polycrystalline films were one to two orders of magnitude greater than that of the film interior, and the trap density at the film interior was still two to three orders of magnitude greater than that in high-quality single crystals. Suprisingly, after surface passivation, most deep traps were detected near the interface of perovskites and hole transport layers, where a large density of nanocrystals were embedded, limiting the efficiency of solar cells.

Bifunctional Ultrathin PCBM Enables Passivated Trap States and Cascaded Energy Level toward Efficient Inverted Perovskite Solar Cells

2020 ◽  
Vol 12 (17) ◽  
pp. 20103-20109 ◽  
Author(s):  
Dongyang Li ◽  
Weiguang Kong ◽  
Haichao Zhang ◽  
Deng Wang ◽  
Wang Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Perovskite Solar Cells ◽  
Trap States

Direct monitoring of ultrafast electron and hole dynamics in perovskite solar cells

2015 ◽  
Vol 17 (22) ◽  
pp. 14674-14684 ◽  
Author(s):  
Piotr Piatkowski ◽  
Boiko Cohen ◽  
Francisco Javier Ramos ◽  
Maria Di Nunzio ◽  
Mohammad Khaja Nazeeruddin ◽  
...  
Keyword(s):  
Solar Cells ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Perovskite Solar Cells ◽  
Transient Absorption Spectroscopy ◽  
Trap States ◽  
Surface Trap

Electron and hole dynamics, and internal and surface trap states in perovskite-based solar cells are explored by fs transient absorption spectroscopy.

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