Large synergy effects of doping, a site substitution, and surface passivation in wide bandgap Pb-free ASnI2Br perovskite solar cells on efficiency and stability enhancement

2022 ◽  
Vol 520 ◽  
pp. 230848
Author(s):  
Mengmeng Chen ◽  
Gaurav Kapil ◽  
Yusheng Li ◽  
Muhammad Akmal Kamarudin ◽  
Ajay K. Baranwal ◽  
...  
Author(s):  
The Duong ◽  
Huyen Pham ◽  
Yanting Yin ◽  
Jun Peng ◽  
Md Arafat Mahmud ◽  
...  

Defects on perovskite surfaces acting as charge-carrier-traps are a key factor limiting the performance of perovskite solar cells (PSCs). Here we studied the defect passivation effect of three bromide-containing alkylammonium...


Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Rui He ◽  
Tingting Chen ◽  
Zhipeng Xuan ◽  
Tianzhen Guo ◽  
Jincheng Luo ◽  
...  

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).


2021 ◽  
Author(s):  
Ran Zhao ◽  
Kai Zhang ◽  
Jiahao Zhu ◽  
Shuang Xiao ◽  
Wei Xiong ◽  
...  

Interface passivation is of the pivot to achieve high-efficiency organic metal halide perovskite solar cells (PSCs). Atomic layer deposition (ALD) of wide band gap oxides has recently shown great potential...


2016 ◽  
Vol 8 (5) ◽  
pp. 1-7 ◽  
Author(s):  
Ming Xu ◽  
Jing Feng ◽  
Xia-Li Ou ◽  
Zhen-Yu Zhang ◽  
Yi-Fan Zhang ◽  
...  

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Shun-Chang Liu ◽  
Chen-Min Dai ◽  
Yimeng Min ◽  
Yi Hou ◽  
Andrew H. Proppe ◽  
...  

AbstractIn lead–halide perovskites, antibonding states at the valence band maximum (VBM)—the result of Pb 6s-I 5p coupling—enable defect-tolerant properties; however, questions surrounding stability, and a reliance on lead, remain challenges for perovskite solar cells. Here, we report that binary GeSe has a perovskite-like antibonding VBM arising from Ge 4s-Se 4p coupling; and that it exhibits similarly shallow bulk defects combined with high stability. We find that the deep defect density in bulk GeSe is ~1012 cm−3. We devise therefore a surface passivation strategy, and find that the resulting GeSe solar cells achieve a certified power conversion efficiency of 5.2%, 3.7 times higher than the best previously-reported GeSe photovoltaics. Unencapsulated devices show no efficiency loss after 12 months of storage in ambient conditions; 1100 hours under maximum power point tracking; a total ultraviolet irradiation dosage of 15 kWh m−2; and 60 thermal cycles from −40 to 85 °C.


2018 ◽  
Vol 11 (9) ◽  
pp. 2353-2362 ◽  
Author(s):  
Efat Jokar ◽  
Cheng-Hsun Chien ◽  
Amir Fathi ◽  
Mohammad Rameez ◽  
Yu-Hao Chang ◽  
...  

Ethylenediammonium diiodide (EDAI2) served as an effective additive for tin-based perovskite solar cells to attain a power conversion efficiency approaching 9%.


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