Merging Passivation in Synthesis Enabling the Lowest Open-Circuit Voltage Loss for PbS Quantum Dot Solar Cells

Liu, Yang1,2; Wu, Hao1; Shi, Guozheng1; Li, Yusheng; Gao, Yiyuan1; Fang, Shiwen1; Tang, Haodong3; Chen, Wei4; Ma, Tianshu5,6,7; Khan, Irfan1; Wang, Kai3; Wang, Changlei5,6,7; Li, Xiaofeng5,6,7; Shen, Qing2; Liu, Zeke1,8; Ma, Wanli1,8

2022-12-01

10.1002/adma.202207293

ADVANCED MATERIALS   Impact Factor & Quartile

0935-9648

1521-4095

The high open-circuit voltage (V-oc) loss arising from insufficient surface passivation is the main factor that limits the efficiency of current lead sulfide colloidal quantum dots (PbS CQDs) solar cell. Here, synergistic passivation is performed in the direct synthesis of conductive PbS CQD inks by introducing multifunctional ligands to well coordinate the complicated CQDs surface with the thermodynamically optimal configuration. The improved passivation effect is intactly delivered to the final photovoltaic device, leading to an order lower surface trap density and beneficial doping behavior compared to the control sample. The obtained CQD inks show the highest photoluminescence quantum yield (PLQY) of 24% for all photovoltaic PbS CQD inks, which is more than twice the reported average PLQY value of approximate to 10%. As a result, a high V-oc of 0.71 V and power conversion efficiency (PCE) of 13.3% is achieved, which results in the lowest V-oc loss (0.35 eV) for the reported PbS CQD solar cells with PCE >10%, comparable to that of perovskite solar cells. This work provides valuable insights into the future CQDs passivation strategies and also demonstrates the great potential for the direct-synthesis protocol of PbS CQDs.

colloidal quantum dots functional molecules passivation solar cells V-oc loss

SCI

English

NI Journal Papers

Others

National Natural Science Foundation of China["22161142003","52002260","92163114"] ; Natural Science Foundation of the Jiangsu Higher Education Institutions of China[21KJA430004] ; Natural Science Foundation of Jiangsu Province of China[BK20200872] ; China Postdoctoral Science Foundation[2021M702415]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000900145200001

WILEY-V C H VERLAG GMBH

MATERIALS SCIENCE

Web of Science

1.Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Joint Int Res Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Jiangsu, Peoples R China
2.Univ Electrocommun, Fac Informat & Engn, Tokyo 1828585, Japan
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
4.Shenzhen Technol Univ, Coll Engn Phys, Shenzhen 518118, Peoples R China
5.Soochow Univ, Sch Optoelect Sci & Engn, Suzhou 215006, Peoples R China
6.Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Key Lab Adv Opt Mfg Technol Jiangsu Prov, Suzhou 215006, Peoples R China
7.Soochow Univ, Key Lab Modern Opt Technol, Educ Minist China, Suzhou 215006, Peoples R China
8.Soochow Univ, Key Lab Modern Opt Technol Educ Minist China, Suzhou 215006, Peoples R China

Liu, Yang,Wu, Hao,Shi, Guozheng,et al. Merging Passivation in Synthesis Enabling the Lowest Open-Circuit Voltage Loss for PbS Quantum Dot Solar Cells[J]. ADVANCED MATERIALS,2022.

Liu, Yang.,Wu, Hao.,Shi, Guozheng.,Li, Yusheng.,Gao, Yiyuan.,...&Ma, Wanli.(2022).Merging Passivation in Synthesis Enabling the Lowest Open-Circuit Voltage Loss for PbS Quantum Dot Solar Cells.ADVANCED MATERIALS.

Liu, Yang,et al."Merging Passivation in Synthesis Enabling the Lowest Open-Circuit Voltage Loss for PbS Quantum Dot Solar Cells".ADVANCED MATERIALS (2022).