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Enhanced efficiency and stability in Sn-based perovskite solar cells by trimethylsilyl halide surface passivation
Zhang, Zheng; Wang, Liang; Kumar Baranwal, Ajay; Sahamir, Shahrir Razey; Kapil, Gaurav; Sanehira, Yoshitaka; Kamarudin, Muhammad Akmal; Nishimura, Kohei; Ding, Chao; Liu, Dong; Li, Yusheng; Li, Hua; Chen, Mengmeng; Shen, Qing; Ripolles, Teresa S.; Bisquert, Juan; Hayase, Shuzi Elsevier (2022-05-13)Lead free tin perovskite solar cells (PKSCs) are the most suitable alternative candidate for conventional lead perovskite solar cells. However, the efficiency and the stability are insufficient, mainly because of the poor ... -
Enhancing the Electronic Properties and Stability of High-EfficiencyTin-Lead Mixed Halide Perovskite Solar Cells via DopingEngineering
Sahamir, Shahrir Razey; Kamarudin, Muhammad Akmal; Ripolles, Teresa S.; Baranwal, Ajay Kumar; Kapil, Gaurav; Qing, Shen; Segawa, Hiroshi; Bisquert, Juan; Hayase, Shuzi American Chemical Society (2022-03-31)Overcoming Voc loss to increase the efficiency of perovskite solar cells (PSCs) has been aggressively studied. In this work, we introduce and compare rubidium iodide (RbI) and potassium iodide (KI) alkali metal halides ... -
High reduction of interfacial charge recombination in colloidal quantum dot solar cells by metal oxide surface passivation
Chang, Jin; Kuga, Yuki; Mora-Sero, Ivan; toyoda, taro; Ogomi, Yuhei; Hayase, Shuzi; Bisquert, Juan; Shen, Qing The Royal Society of Chemistry (2015)Bulk heterojunction (BHJ) solar cells based on colloidal QDs and metal oxide nanowires (NWs) possess unique and outstanding advantages in enhancing light harvesting and charge collection in comparison to planar architectures. ... -
High-Efficiency Lead-Free Wide Band Gap Perovskite Solar Cells via Guanidinium Bromide Incorporation
Chen, Mengmeng; Kamarudin, Muhammad Akmal; Baranwal, Ajay Kumar; Kapil, Gaurav; Ripolles, Teresa S.; Nishimura, Kohei; Hirotani, Daisuke; Sahamir, Shahrir Razey; Zhang, Zheng; Ding, Chao; Sanehira, Yoshitaka; Bisquert, Juan; Shen, Qing; Hayase, Shuzi American Chemical Society (2021-09-27)Despite lead halide perovskite(top)/silicon(bottom) tandem solar cell achieving >29% efficiency, the toxicity of lead limits the adoption of perovskites in electronic devices. To solve this problem, tin perovskite has been ... -
Improvement of Photovoltaic Performance of Colloidal Quantum Dot Solar Cells Using Organic Small Molecule as Hole-Selective Layer
Zhang, Yaohong; Wu, Guohua; Mora-Sero, Ivan; Ding, Chao; Liu, Feng; Huang, Qingxun; Ogomi, Yuhei; Hayase, Shuzi; toyoda, taro; Wang, Ruixiang; Otsuki, Joe; Qing, Shen American Chemical Society (2017-04)A novel organic small molecule bis-triphenylamine with spiro(fluorene-9,9′-xanthene) as the conjugated system, named BTPA-4, is successfully synthesized and employed as the hole-selective layer (HSL) in colloidal quantum ... -
Large Grain Growth and Energy Alignment Optimization by Diethylammonium Iodide Substitution at A Site in Lead-Free Tin Halide Perovskite Solar Cells
zhang, zheng; Baranwal, Ajay Kumar; Sahamir, Shahrir Razey; Kapil, Gaurav; Sanehira, Yoshitaka; Chen, Mengmeng; Nishimura, Kohei; Ding, Chao; Liu, Dong; Li, Hua; Li, Yusheng; Kamarudin, Muhammad Akmal; Shen, Qing; Ripolles, Teresa S.; Bisquert, Juan; Hayase, Shuzi Wiley (2021-10-13)Environment-friendly tin perovskite solar cells (T-PKSCs) are the most suitable alternative candidate for lead-free PKSCs. However, the photovoltaic performance of such T-PKSCs is far below those of lead-based perovskite ... -
Mechanisms of charge accumulation in the dark operation of perovskite solar cells
Ripolles, Teresa S.; Baranwal, Ajay K.; Nishinaka, Koji; Ogomi, Yuhei; Garcia-Belmonte, Germà; Hayase, Shuzi Royal Society of Chemistry (2016)In this work, a new current peak at forward bias in the dark current–voltage curves has been identified for standard mesoscopic perovskite solar cells. This characteristic peak appears only under some specific conditions, ... -
Tunable Open Circuit Voltage by Engineering Inorganic Cesium Lead Bromide/Iodide Perovskite Solar Cells
Ng, Chi Huey; Ripolles, Teresa S.; Hamada, Kengo; Teo, Siow Hwa; Lim, Hong Ngee; Bisquert, Juan; Hayase, Shuzi Nature Publishing Group (2018)Perovskite solar cells based on series of inorganic cesium lead bromide and iodide mixture, CsPbBr3-xI x , where x varies between 0, 0.1, 0.2, and 0.3 molar ratio were synthesized by two step-sequential deposition at ambient ...