²é¿´: 7492  |  »Ø¸´: 58
µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû

lcazzapple

ľ³æ (ÕýʽдÊÖ)

[½»Á÷] ¡¾ÌÖÂÛ¡¿¹âµçת»»ÂÊ×î¸ß¿É´ï100% ÐÂÐÍÌ«ÑôÄÜµç³ØÑз¢³É¹¦¡£ÕâÏûÏ¢ÕæµÄ¼ÙµÄ£¿£¿ ÒÑÓÐ30È˲ÎÓë

¼ÓÖÝÀí¹¤Ñ§Ôº½üÈÕÑз¢³öÁËÒ»ÖÖеÄÌ«ÑôÄÜµç³Ø£¬Æä»ù±¾Ô­ÀíÊǽ«Ï¸³¤µÄ¹èÏßÕóÁÐǶÈë¾ÛºÏÎï»ù°åÖС£³ýÁËÏ˱¡¿ÉÍäÇúÍ⣬Ëü¶ÔÌ«Ñô¹âµÄÎüÊպ͹âµçת»»Ð§ÂÊ·½Ã涼ȡµÃÁ˼«´óµØÍ»ÆÆ¡£´ËÍ⣬ºÍ´«Í³Ì«ÑôÄÜµç³ØËùÐèÒªµÄ°º¹óµÄ°ëµ¼Ìå²ÄÁÏÁ¿Ïà±È£¬ÕâÖÖÐÂÐÍÌ«ÑôÄÜµç³Ø½öÐèҪһС²¿·Ö¡£

Ó¦ÓÃÎïÀíѧ¼°²ÄÁÏѧ½ÌÊÚHarry AtwaterºÍHoward Hughes±íʾ£º¡°ÕâЩ̫ÑôÄÜµç³ØÊ×´ÎÍ»ÆÆÁË´«Í³µÄÎü¹â²ÄÁϵĹⲶ»ñ¼«ÏÞ¡£¡±ÐÂÐÍÌ«ÑôÄÜµç³ØËù²ÉÓõĹèÏßÕóÁжԵ¥Ò»²¨³¤µÄÈëÉä¹âµÄÎüÊÕÂʸߴï96%£¬¶ÔÈ«²¨³¤Ñô¹âµÄ²¶»ñÂʿɴï85%¡£

AtwaterÖ¸³ö£º¡°Ðí¶à²ÄÁ϶ԹâÏߵIJ¶»ñÄÜÁ¦ºÜºÃ£¬µ«ÊÇÈ´ÎÞ·¨×ª»»³ÉµçÄÜ£¬±ÈÈçºÚÍ¿ÁÏ¡£¶ÔÓÚÌ«ÑôÄÜµç³ØÀ´Ëµ£¬ÎüÊյĹâ×ÓÄÜ·ñת»»ÎªµçºÉÔØ×Ó£¨charge carrier£©Ò²·Ç³£ÖØÒª¡£¡±¶øËûÃÇÑз¢µÄ¹èÏßÕóÁÐÌ«ÑôÄÜµç³ØÔò¿ÉÒÔ½«ËùÎüÊÕ¹â×ÓµÄ90%ÖÁ100%ת»»Îªµç×Ó¡£´Ó¼¼ÊõÉϽ²£¬ÕâÖÖÕóÁÐÓµÓм¸½üÍêÃÀµÄÄÚ²¿Á¿×ÓЧÂÊ£¨internal quantum efficiency£©¡£

Atwater×ܽá˵£º¡°¶Ô¹âµÄ¸ßÎüÊÕÂʺͽϺõÄת»»ÄÜÁ¦³É¾ÍÁËÕâÖÖÌ«ÑôÄÜµç³ØµÄ¸ßÖÊÁ¿¡£¡±

¹èÏßÕóÁÐÖеĹèÏß³¤¶ÈÔÚ30ÖÁ100΢Ã×£¨micron£©Ö®¼ä£¬Ö±¾¶½öΪ1΢Ãס£Õû¸öÕóÁеĺñ¶ÈÏ൱ÓÚ¹èÏߵij¤¶È£¬µ«ÊÇ´ÓÃæ»ý»òÌå»ý½Ç¶ÈÀ´¿´£¬ÕâÖÖ²ÄÁÏÖÐÖ»ÓÐ2%²ÅÊǹ裬ÆäËü98%¶¼ÊǾۺÏÎï¡£ÓÉÓÚ¹èÊÇ´«Í³Ì«ÑôÄÜµç³ØÖÐÒ»Öֺܰº¹óµÄ³É·Ö£¬ËùÒÔÕâÖÖÖ»ÐèÒª´«Í³ËùÐèÁ¿1/50µÄÌ«ÑôÄÜµç³ØÍ¶²úµÄ³É±¾½«µÍºÜ¶à¡£

===================================================
High-efficiency solar cells
19 February 2010

Using arrays of long, thin silicon wires embedded in a polymer substrate, a team of scientists from the California Institute of Technology (Caltech) has created a new type of flexible solar cell that efficiently converts photons into electrons.


¡®These solar cells have, for the first time, surpassed the conventional light-trapping limit for absorbing materials,¡¯ said Harry Atwater, Howard Hughes professor of applied physics and materials science at Caltech.

The light-trapping limit of a material refers to how much sunlight it is able to absorb.


The silicon-wire arrays absorb up to 96 per cent of incident sunlight at a single wavelength and 85 per cent of total collectible sunlight.

The silicon-wire arrays are able to convert between 90 and 100 per cent of the photons they absorb into electrons.

The key to the success of the solar cells is their silicon wires, each of which, said Atwater, are independent highly efficient and high-quality solar cells.

When brought together in an array, however, they¡¯re even more effective, because they interact to increase the cell¡¯s ability to absorb light.

Light comes into each wire and a portion is absorbed and another portion scatters.

The collective scattering interactions between the wires make the array very absorbing.

This effect occurs despite the sparseness of the wires in the array - they cover only between two to 10 per cent of the cell¡¯s surface area.

The new solar cells also use only a fraction of the expensive semiconductor materials required by conventional solar cells.

Just two per cent of the cell is silicon, while 98 per cent is polymer.

Since the silicon material is an expensive component of a conventional solar cell, a cell that requires just two per cent of the amount of semiconductor material will be much cheaper to produce.

The composite nature of these solar cells, Atwater added, means that they are also flexible. ¡®Because flexible thin films can be manufactured in a roll-to-roll process, it is an inherently lower-cost process than one that involves brittle wafers like those used to make conventional solar cells,¡¯ he said.

The next steps, Atwater said, are to increase the operating voltage and the overall size of the solar cell. ¡®The structures we¡¯ve made are square centimetres in size,¡¯ he explained. ¡®We¡¯re now scaling up to make cells that will be hundreds of square centimetres - the size of a normal cell.¡¯

Atwater says that the team is already ¡¯on its way¡¯ to showing that large-area cells work just as well as these smaller versions.

===================================================

¸Ã¿ÎÌâ×é·¢±íÔÚScienceÉϵÄ×îÐÂÎÄÕÂ
Science 8 January 2010:
Vol. 327. no. 5962, pp. 185 - 187
DOI: 10.1126/science.1180783


Energy-Conversion Properties of Vapor-Liquid-Solid¨CGrown Silicon Wire-Array Photocathodes

Shannon W. Boettcher, Joshua M. Spurgeon, Morgan C. Putnam, Emily L. Warren, Daniel B. Turner-Evans, Michael D. Kelzenberg, James R. Maiolo, Harry A. Atwater,* Nathan S. Lewis*

¸Ã¿ÎÌâ×é·¢±íÔÚNature MaterialÉϵÄ×îÐÂÎÄÕÂ
Nature Materials 9, 239 - 244 (2010)
Published online: 14 February 2010 | Corrected online: 19 February 2010 | doi:10.1038/nmat2635

Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications
Michael D. Kelzenberg1, Shannon W. Boettcher1, Jan A. Petykiewicz1, Daniel B. Turner-Evans1, Morgan C. Putnam1, Emily L. Warren1, Joshua M. Spurgeon1, Ryan M. Briggs1, Nathan S. Lewis1 & Harry A. Atwater1

[ Last edited by lcazzapple on 2010-3-3 at 12:39 ]
»Ø¸´´ËÂ¥

» ÊÕ¼±¾ÌûµÄÌÔÌûר¼­ÍƼö

×ÛÊöÀàÎÄÕÂ+Ç°ÑØÑо¿ ÆäËûµç³Ø ¾«»ªÌû-ºÃ×ÊÔ´

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹ØÉ̼ÒÍÆ¼ö: (ÎÒÒ²ÒªÔÚÕâÀïÍÆ¹ã)

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

University_of_New_South_Wales+Uppsala_University
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

huaishi

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

ÕæµÄ¼ÙµÄ£¬ÓпÉÄÜЧÂÊÊǺܸߣ¬µ«Ò²Ì«¸ßµÄ°É£¬ÓдµµÄÏÓÒÉ£¡£¡£¡
²èÁ¹ÁË£¬Ò²²»ÒªÔÙΪÎÒÐøÉÏ¡­¡­
3Â¥2010-03-02 10:47:01
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 59 ¸ö»Ø´ð

wulishi8

ר¼Ò¹ËÎÊ (ÖªÃû×÷¼Ò)

¡ï
Сľ³æ(½ð±Ò+0.5):¸ø¸öºì°ü£¬Ð»Ð»»ØÌû½»Á÷
×î½ü¹ØÓÚÌ«ÑôÄÜµç³Ø·½ÃæµÄÎÄÕºܶ࣬ţ´µµÄ¶¼ºÜ´ó¡£
ÖÐɽ´óѧ²ÄÁÏѧԺÕÐÆ¸²©Ê¿ºóºÍרְÑо¿Ô±£¬Äêн20ÍòÆð£¬ÇëÕ¾ÄÚÁªÏµ£¬Ð»Ð»¡£
2Â¥2010-03-02 10:37:52
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zhanglexi

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

Сľ³æÂ·¹ýÖ®Íõ

¡ï
Сľ³æ(½ð±Ò+0.5):¸ø¸öºì°ü£¬Ð»Ð»»ØÌû½»Á÷
²»ÖªµÀÖÆ×÷ÓжิÔÓ£¬¹¤Òµ»¯Ç°¾°²»¼ûµÃЧÂʸߵľͺã¬ÒªÍ³³ï¿¼ÂÇ¡­¡­
Inner peace.
4Â¥2010-03-02 11:21:26
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

misaki8686

½ð³æ (ÕýʽдÊÖ)

¡ï
Сľ³æ(½ð±Ò+0.5):¸ø¸öºì°ü£¬Ð»Ð»»ØÌû½»Á÷
Õâ¸öÖµ»¹ÊÇ¿ÉÒԵİɣ¬ÆðÂë¿´ÖÐÎĵÄÒâ˼£¬Ö¸µÄÊDZ»ÎüÊյĹâ×Ó£¬¶øÇÒÈ˼Ò˵µÄÊÇ¿Éת»¯Îªµç×Ó£¬²¢Ã»ËµÊÇ¿ÉÊä³öµÄµçÁ¿£¬²»¿¼ÂÇת»»Ç°µÄÎüÊÕËðʧºÍת»»ºóµÄ´«µ¼¸´ºÏËðʧµÄ»°£¬Õâ¸öÖµ»¹ºÃ¡£
5Â¥2010-03-02 11:56:57
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] ÉúÎïѧµ÷¼Á +5 Surekei 2026-03-21 5/250 2026-03-22 14:39 by tcx007
[¿¼ÑÐ] ѰÕÒµ÷¼Á +3 ¾óǿâ? 2026-03-21 3/150 2026-03-22 14:27 by 30660438
[¿¼ÑÐ] 291 Çóµ÷¼Á +3 »¯¹¤2026½ì±ÏÒµÉ 2026-03-21 3/150 2026-03-22 14:26 by ColorlessPI
[¿¼ÑÐ] 280Çóµ÷¼Á +11 ¹¾ààÏþÏþ 2026-03-18 12/600 2026-03-21 22:40 by ACS Nano¡ª¡ª
[¿¼ÑÐ] »¯Ñ§¹¤³Ì321·ÖÇóµ÷¼Á +18 ´óÃ×·¹£¡ 2026-03-15 22/1100 2026-03-21 20:20 by HHÁìÐä
[¿¼ÑÐ] 326Çóµ÷¼Á +5 ŵ±´¶û»¯Ñ§½±êéê 2026-03-15 8/400 2026-03-21 19:33 by ColorlessPI
[¿¼ÑÐ] 302Çóµ÷¼Á +12 ºôºôºô¡£¡£¡£¡£ 2026-03-17 12/600 2026-03-21 17:29 by ColorlessPI
[¿¼ÑÐ] Ò»Ö¾Ô¸ÖØÇì´óѧ085700×ÊÔ´Óë»·¾³×Ü·Ö308Çóµ÷¼Á +7 īīĮ 2026-03-20 7/350 2026-03-21 16:36 by barlinike
[¿¼ÑÐ] 279Çóµ÷¼Á +5 ºìÒÂÒþ¹Ù 2026-03-21 5/250 2026-03-21 14:59 by lature00
[¿¼ÑÐ] 279·ÖÇóµ÷¼Á Ò»Ö¾Ô¸211 +14 chaojifeixia 2026-03-19 15/750 2026-03-21 13:24 by zhukairuo
[¿¼ÑÐ] Çóµ÷¼Á +3 Ma_xt 2026-03-17 3/150 2026-03-21 02:05 by JourneyLucky
[¿¼ÑÐ] Ò»Ö¾Ô¸Öк£Ñó²ÄÁϹ¤³Ìר˶330·ÖÇóµ÷¼Á +8 С²Ä»¯±¾¿Æ 2026-03-18 8/400 2026-03-20 23:16 by JourneyLucky
[¿¼ÑÐ] 324Çóµ÷¼Á +5 luckyѽѽѽѼ 2026-03-20 5/250 2026-03-20 22:30 by ´ÙÌì³É
[¿¼ÑÐ] ²ÄÁÏѧ˶297ÒѹýËÄÁù¼¶Çóµ÷¼ÁÍÆ¼ö +11 adaie 2026-03-19 11/550 2026-03-20 21:30 by laoshidan
[¿¼ÑÐ] ²ÄÁÏѧÇóµ÷¼Á +4 Stella_Yao 2026-03-20 4/200 2026-03-20 20:28 by ms629
[¿¼ÑÐ] ¹ãÎ÷´óѧ¼ÒÇÝÒÅ´«ÓýÖÖ¿ÎÌâ×é2026Äê˶ʿÕÐÉú£¨½ÓÊÕ¼ÆËã»úרҵµ÷¼Á£© +3 123°¢±ê 2026-03-17 3/150 2026-03-20 15:58 by ·ÉÐÐçù
[¿¼ÑÐ] 281Çóµ÷¼Á£¨0805£© +14 ÑÌÏ«Ò亣 2026-03-16 25/1250 2026-03-20 15:47 by yuncha
[¿¼ÑÐ] 290Çóµ÷¼Á +3 p asserby. 2026-03-15 4/200 2026-03-17 16:35 by wangkm
[¿¼ÑÐ] 283Çóµ÷¼Á +3 Ìý·ç¾ÍÊÇÓꣻ 2026-03-16 3/150 2026-03-17 07:41 by ÈÈÇéɳĮ
[¿¼ÑÐ] 318Çóµ÷¼Á +3 Yanyali 2026-03-15 3/150 2026-03-16 16:41 by houyaoxu
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û