scholarly journals Optimized Carrier Extraction at Interfaces for 23.6% Efficient Tin–Lead Perovskite Solar Cells

2021 ◽  
Author(s):  
Shuaifeng Hu ◽  
Kento Otsuka ◽  
Richard Murdey ◽  
Tomoya Nakamura ◽  
Minh Anh Truong ◽  
...  
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
Surface Passivation ◽  
Perovskite Solar Cells ◽  
Inert Atmosphere ◽  
Open Circuit ◽  
Carrier Lifetimes ◽  
Bottom Interface ◽  
Improved Stability ◽  
Carrier Extraction

Abstract Carrier extraction is a key issue which limits the efficiency of perovskite solar cells. In this work, carrier extraction is improved by modifying the perovskite layers with a combination of ethylenediammonium diiodide post-treatment and glycine hydrochloride additive. Ethylenediammonium dications primarily affect the top surface of the perovskite films, while glycinium cations preferentially accumulate at the bottom region. The top and bottom interface modifications improve the crystallinity of the perovskite films and lower the density of electrical traps via surface passivation effects, resulting in long charge carrier lifetimes. The orientated aggregation of the ethylenediammonium and glycinium cations at the charge collection interfaces result in the formation of surface dipoles, which facilitate charge extraction. The performance of the treated solar cell devices also increases. The fill factor rose to 0.82, and the power conversion efficiency reaches 23.6% (23.1% certified). The open circuit voltage reaches 0.91 V, just 0.06 V below the Shockley–Queisser limit. The unencapsulated devices also show improved stability under AM 1.5G, retaining over 80% of the initial efficiency after 200 h continuous operation in inert atmosphere. Our strategy is also successfully applied to centimeter-scale devices, with efficiencies up to 21.0%.

scholarly journals Efficient wide-bandgap perovskite solar cells enabled by doping a bromine-rich molecule

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Rui He ◽  
Tingting Chen ◽  
Zhipeng Xuan ◽  
Tianzhen Guo ◽  
Jincheng Luo ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Open Circuit Voltage ◽  
Perovskite Solar Cells ◽  
Wide Bandgap ◽  
Open Circuit ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Tandem Solar Cells ◽  
Carrier Lifetimes

Abstract Wide-bandgap (wide-E g , ∼1.7 eV or higher) perovskite solar cells (PSCs) have attracted extensive attention due to the great potential of fabricating high-performance perovskite-based tandem solar cells via combining with low-bandgap absorbers, which is considered promising to exceed the Shockley–Queisser efficiency limit. However, inverted wide-E g PSCs with a minimized open-circuit voltage (V oc) loss, which are more suitable to prepare all-perovskite tandem devices, are still lacking study. Here, we report a strategy of adding 1,3,5-tris (bromomethyl) benzene (TBB) into wide-E g perovskite absorber to passivate the perovskite film, leading to an enhanced average V oc. Incorporation of TBB prolongs carrier lifetimes in wide-E g perovskite due to reduction of defects in perovskites and makes a better energy level matching between perovskite absorber and electron transport layer. As a result, we achieve the power conversion efficiency of 17.12% for our inverted TBB-doped PSC with an enhanced V oc of 1.19 V, compared with that (16.14%) for the control one (1.14 V).

Voltage output of efficient perovskite solar cells with high open-circuit voltage and fill factor

2014 ◽  
Vol 7 (8) ◽  
pp. 2614-2618 ◽  
Author(s):  
Seungchan Ryu ◽  
Jun Hong Noh ◽  
Nam Joong Jeon ◽  
Young Chan Kim ◽  
Woon Seok Yang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Perovskite Solar Cells ◽  
Open Circuit ◽  
Solar Absorber ◽  
Voltage Output ◽  
Hole Transporting ◽  
Hole Transporting Materials

The voltage output of perovskite solar cells is found to be dependent on both the energy level of perovskite itself as a solar absorber and hole transporting materials.

Promises and challenges of perovskite solar cells

Science ◽  
2017 ◽  
Vol 358 (6364) ◽  
pp. 739-744 ◽  
Author(s):  
Juan-Pablo Correa-Baena ◽  
Michael Saliba ◽  
Tonio Buonassisi ◽  
Michael Grätzel ◽  
Antonio Abate ◽  
...  
Keyword(s):  
Solar Cells ◽  
Performance Metrics ◽  
Perovskite Solar Cells ◽  
Open Circuit ◽  
Carrier Lifetimes ◽  
Long Term Stability ◽  
Current State ◽  
Recent Developments ◽  
Key Issues

The efficiencies of perovskite solar cells have gone from single digits to a certified 22.1% in a few years’ time. At this stage of their development, the key issues concern how to achieve further improvements in efficiency and long-term stability. We review recent developments in the quest to improve the current state of the art. Because photocurrents are near the theoretical maximum, our focus is on efforts to increase open-circuit voltage by means of improving charge-selective contacts and charge carrier lifetimes in perovskites via processes such as ion tailoring. The challenges associated with long-term perovskite solar cell device stability include the role of testing protocols, ionic movement affecting performance metrics over extended periods of time, and determination of the best ways to counteract degradation mechanisms.

Brookite TiO2 as a low-temperature solution-processed mesoporous layer for hybrid perovskite solar cells

2015 ◽  
Vol 3 (42) ◽  
pp. 20952-20957 ◽  
Author(s):  
Atsushi Kogo ◽  
Yoshitaka Sanehira ◽  
Masashi Ikegami ◽  
Tsutomu Miyasaka
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Perovskite Solar Cells ◽  
Solution Process ◽  
Open Circuit ◽  
Free Solution ◽  
Crystalline Layer ◽  
Hybrid Perovskite ◽  
Temperature Solution

A highly crystalline layer of brookite TiO2 was prepared by a sinter-free solution process (<150 °C) as an efficient mesoporous electron collector for perovskite solar cells. In comparison with anatase TiO2 mesostructure, higher open-circuit voltage and fill factor are obtained.

scholarly journals Copper Iodide Interlayer for Improved Charge Extraction and Stability of Inverted Perovskite Solar Cells

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1406 ◽  
Author(s):  
Danila Saranin ◽  
Pavel Gostischev ◽  
Dmitry Tatarinov ◽  
Inga Ermanova ◽  
Vsevolod Mazov ◽  
...  
Keyword(s):  
Solar Cells ◽  
Surface Passivation ◽  
Perovskite Solar Cells ◽  
High Mobility ◽  
Open Circuit ◽  
Hole Transport ◽  
Band Alignment ◽  
Hole Injection ◽  
Copper Iodide ◽  
Shunt Resistance

Nickel oxide (NiO) is one of the most promising and high-performing Hole Transporting Layer (HTL) in inverted perovskite solar cells due to ideal band alignment with perovskite absorber, wide band gap, and high mobility of charges. At the same time, however, NiO does not provide good contact and trap-free junction for hole collection. In this paper, we examine this problem by developing a double hole transport configuration with a copper iodide (CuI) interlayer for efficient surface passivation. Transient photo-current (TPC) measurements showed that Perovskite/HTL interface with CuI interlayer has an improved hole injection; CuI passivation reduces the concentration of traps and the parasitic charge accumulation that limits the flow of charges. Moreover, we found that CuI protect the HTL/perovskite interface from degradation and consequently improve the stability of the cell. The presence of CuI interlayer induces an improvement of open-circuit voltage VOC (from 1.02 V to 1.07 V), an increase of the shunt resistance RSH (100%), a reduction of the series resistance RS (−30%), and finally a +10% improvement of the solar cell efficiency.

scholarly journals High-performance perovskite solar cells obtained by hybridizing SnS quantum dots with CH3NH3PbI3

2021 ◽  
Author(s):  
Liya Zhou ◽  
Xiaoying Zhong ◽  
Hua Fan ◽  
Jiangying Lu ◽  
Yingjun Ou
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Fill Factor ◽  
Crystal Size ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Open Circuit ◽  
Photoelectric Conversion Efficiency ◽  
Large Crystal ◽  
Photoelectric Conversion

Abstract In this work, SnS quantum dot (QDs) were added into the CH3NH3PbI3 (MAPI) perovskite precursor solution to fabricate MAPI/SnS QDs films with preferred (110) orientation and a perovskite film with large crystal size. This hybrid material showed increased light harvesting ability and a red shift with respect to the number of SnS QDs. As a result, an enhanced performance was achieved in the perovskite solar cells (PSCs) based on MAPI/SnS QDs prepared from the S5, exhibiting a maximum photoelectric conversion efficiency (PCE) of 10.15%, an open-circuit voltage (Voc) of 1.41 V and a fill factor (FF) of 65%.

20.7% highly reproducible inverted planar perovskite solar cells with enhanced fill factor and eliminated hysteresis

2019 ◽  
Vol 12 (5) ◽  
pp. 1622-1633 ◽  
Author(s):  
Xixia Liu ◽  
Yuanhang Cheng ◽  
Chao Liu ◽  
Tianxiang Zhang ◽  
Nengduo Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Buffer Layer ◽  
Fill Factor ◽  
Perovskite Solar Cells ◽  
Highly Efficient ◽  
Hydrophilic Group ◽  
Improved Stability

The approach of a hydrophilic group grafted buffer layer (HGGBL) was investigated for perovskite growth to realize highly efficient inverted planar perovskite solar cells with superior reproducibility, negligible hysteresis and improved stability.

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